Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef92928bb673afb2…

MALICIOUS

PDF

49.7 KB Created: 2020-08-18 16:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b115a2404374017a53f702dce1281a1 SHA-1: 6e05a90d30b06853617d42b4364aaa25ffb7934a SHA-256: ef92928bb673afb2f7fdb5dcaab7ac61ec2c9e9cd7f553d97f8406ea5cfe8a11
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=bubble+shooter+arena'. The document body, though heavily corrupted, contains text fragments and URLs that suggest a lure, possibly related to a game, to entice users to click the malicious link. The presence of a 'download button' heuristic further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=bubble+shooter+arena In PDF document text
    • http://files.aboundinlove.com/uploads/1/3/0/9/130969748/goserenan-vevuv.pdfIn PDF document text
    • http://bowepefiw.centralmathshub.com/uploads/1/3/2/7/132710712/6110066.pdfIn PDF document text
    • http://derudebit.mscg19.com/uploads/1/3/1/3/131380771/nazewedora.pdfIn PDF document text
    • http://files.relaxandsucceed.net/uploads/1/3/1/6/131637896/7e0d628488ed67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8312/9251/files/dogesumodefizogopeno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/free_alternative_android_app_store.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/celebrity_endorsement_case_study.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7734/1079/files/kusavegakoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/vuxibiguso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4261/1095/files/cell_cycle_diagram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/wekojekep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/52306594900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/71230486430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/wikosidunusuvugom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9418/7933/files/zudawezoweborode.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/microbiology_in_telugu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FA 4964 bytes
SHA-256: bd0c46412e9d70c33724bd1c00ffa61c89ee545de9fea2d5654be3d3452b7437
font_01_sfnt_off000073c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73C3 2448 bytes
SHA-256: 68d006988cae8d53318ebe63c67ad34919f3873b4f484edbc5d032c1b93ba19b
font_02_sfnt_off00007ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA6 10508 bytes
SHA-256: 46e819949b40b412838b2934ab7a1b41c68a60bb38d786c9f5394a48fadef65a
font_03_sfnt_off0000a2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C7 16572 bytes
SHA-256: a55af39e272d9a75545804fe3a0d54ec4ce0fb5703e2da24269688049f80afda