Malicious PDF — malware analysis report

Static analysis result for SHA-256 681f0f19996c9c30…

MALICIOUS

PDF

62.8 KB Created: 2020-08-30 22:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8c5499e8cab9ebd8a7ab2d5349cb7af1 SHA-1: 6d133919cd508e9a90799708af3d2eba929bac17 SHA-256: 681f0f19996c9c30eea52fa67d3ce194c7154ddb28ed3adb4e2201188949b975
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains numerous embedded links, many of which point to a redirector infrastructure identified as malicious. The document body, though heavily obfuscated, contains text suggesting it is a guide and includes the malicious URL. This indicates a likely phishing or malware distribution attempt, leveraging a lure to redirect users to harmful content.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.ru/wix?keyword=the+complete+guide+to+option+selling In 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/1/0435/5630/7107/files/nekumupoderanazatazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9927/3882/files/java_lang_null_pointer_exception_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8307/9592/files/fibonacci_sequence_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5106/4228/files/54273916129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/fosobas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/cardioversion_electrica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/48810312598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/muxalonowoxuvumofuv.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1813b3_d6252bf5cd924faba93d8ff58d41bb91.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1f6d71_40ea39dcde71449e9d2f43e8adc9c4a9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e3834b_c256e4faa626470f97fef653e7d08c47.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e4ff69_0f847a5454a04461b3f309dcfd9ea636.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7598fa_9cb8814bc15d4e949be33a13bbc1c493.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_78b162e72da3437086b193559b6a6bf9.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/225520_3fd6ab8c880d4b59b57c11ccbc881508.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_fff7a2b6cdc04b4a86919b16fa7089a6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e8506d_a10345310f744a0c9a3e6b1535b7550b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_157440d2edae43d6b7bdffdd7c5d561d.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000acfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACFB 5132 bytes
SHA-256: d6ecf6b5cced37d486d3791e9e18e83c1f6c568070740b51461de9c91059f091
font_01_sfnt_off0000be4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4C 2268 bytes
SHA-256: 7f38c7bd3076d5ec567b373f8788658f617417f44aeaffad1c2d563936ecbb0a
font_02_sfnt_off0000c85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85C 11188 bytes
SHA-256: ecf61259e1ea2d61c4fa6cf48b550a13b5d1daf036b46e38acfeb73e059b3e80