Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d24795d706663f…

MALICIOUS

PDF

51.7 KB Created: 2020-08-19 23:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 221fcb5a1eb3d518062a2c6b876433c6 SHA-1: 7b6dcbba95df3f54b4238ceb7b28d73a46cb8ad9 SHA-256: a8d24795d706663f977973ddbf521813088c5b6f65740b16caaa1a50b2f24bba
234 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to lure users to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a Facebook app, further supporting the malicious redirector finding. The presence of a remote support tool lure suggests a potential pretext for further compromise or social engineering.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/pify?keyword=facebook+app+for+android+4.+2.+2 In PDF document text
    • http://files.jambandpurist.com/uploads/1/3/1/8/131856365/76af5249.pdfIn PDF document text
    • http://files.elrepco.com/uploads/1/3/2/7/132740214/119545.pdfIn PDF document text
    • http://xamogez.katydunlapyoga.com/uploads/1/3/1/3/131397970/3671135.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/1/0433/0687/7080/files/1741436775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4429/0205/files/evangelios_apocrifos_bac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/23904075600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2293/1352/files/sifidog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4082/3706/files/alcatraz_prison_guard_uniform.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/27061542497.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8075/1006/files/practical_magic_book_of_shadows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/importance_of_amenities_in_tourism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/kisiwulub.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_off00008c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C86 5348 bytes
SHA-256: d3ffb36ccc33f5255c9a8fe17e8512ab496c42a3e12c5ac38294ab003a317f1b
font_01_sfnt_off00009ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9ED3 10304 bytes
SHA-256: 84dd59644a46bfc1242e920e58acd99b2ba8814f49c32b706a48761a1bfd8c6c

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