Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8315ff806faaa3…

MALICIOUS

PDF

50.0 KB Created: 2020-07-24 11:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: 063b9704113b6fde120a7660857f7587 SHA-1: f6954c0ac80d1b32c47e759143700c517f57757e SHA-256: 9b8315ff806faaa3374b238415f7597f32a318e10c2ee9160463ed9d383cae9d
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a direct link to a known malicious redirector at 'ttraff.com'. Another heuristic identifies a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content across multiple sites. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.com/wb?keyword=il%20buio%20oltre%20la%20siepe%20testo%20completo%20pdf In PDF document text
    • http://files.vigaeatery.com/uploads/1/3/1/3/131379217/zitiweku.pdfIn PDF document text
    • http://files.azpetscan.com/uploads/1/3/2/6/132682171/6439656.pdfIn PDF document text
    • http://files.triplikit.com/uploads/1/3/1/0/131070146/gijugeteridur.pdfIn PDF document text
    • http://files.soduparentsposse.com/uploads/1/3/2/7/132710676/mozewejijen-zegedurogaxan-zuzoxi-jazetalepiz.pdfIn PDF document text
    • http://files.geo-mac.com/uploads/1/3/1/4/131483343/nezegufip.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/1/0428/1312/8867/files/sudazuwike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4438/8514/files/nugunesiwezoseguseboz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8924/8927/files/kopupigaxibon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/jalodaxelevevikevixug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/begusepubaronurexuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/fitodufozinamunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4311/9516/files/96546383558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/27839294834.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/39788637654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/70648336699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5409/4743/files/fatilumopixuzumiloxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/zomexixaralesijoj.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8465 5156 bytes
SHA-256: 56949a86dfd1ef0c5d021c46d9e5274038dd5e64e584d80ee991b3900fd4b6b2
font_01_sfnt_off000095e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E0 10328 bytes
SHA-256: 650f6b651d08bada940234a2beec7059fc8dcbfdd41ddb4e7293cf47088425e4

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