Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7524da86dfc639e…

MALICIOUS

PDF

38.3 KB Created: 2020-08-14 04:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9b3328d545d3f778eb292fa5b8dec324 SHA-1: a472f96e28e7d8cae8fcb80264ce866bf57b3b30 SHA-256: a7524da86dfc639e579e224d1843d2e91251a37eb02ec06091f0c06f731e4258
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 a link farm hosted on cdn.shopify.com. One of these links, ttraff.ru, is identified as a malicious redirector. The document body contains text related to 'among us apk new version' and coupon-like filenames, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=among+us+apk+new+version In PDF document text
    • http://files.kpcdesign.org/uploads/1/3/2/6/132682868/3198935.pdfIn PDF document text
    • http://files.sirkil.com/uploads/1/3/1/4/131455621/8463579.pdfIn PDF document text
    • http://files.fieldofdreamshuntprogram.org/uploads/1/3/2/6/132695321/91888ad94c.pdfIn PDF document text
    • http://files.kelvinngmagic.com/uploads/1/3/0/9/130969080/jabotixodifuk-rulesarilut-mojutotojupiduk-nekevojide.pdfIn PDF document text
    • http://pilav.infocuscreativeyuma.com/uploads/1/3/0/9/130969060/7609762.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/1/0447/2176/6556/files/burger_king_coupons_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/interview_questions_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/effective_classroom_communication.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/23854420622.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3850/7169/files/60537518899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/53199684666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1578/2048/files/25098812639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/67692581429.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9363/8811/files/black_hole_mathematics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5035/3318/files/chemistry_of_love_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/30354649901.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_off00005793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5793 5312 bytes
SHA-256: 99ef4472df7874817d56e137fbf5a31fac4a3f29a4bae415bf3896a780122d8a
font_01_sfnt_off000069ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69AC 10144 bytes
SHA-256: 0f9e0e7cb1104a3226a764bb4b3f19a03a0a48f9256c5cb0f8dfeecb32c5f303

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