Malicious PDF — malware analysis report

Static analysis result for SHA-256 152c1c139e9509ab…

MALICIOUS

PDF

44.8 KB Created: 2020-08-20 08:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 40edb30016ac03498bb83ee501766060 SHA-1: f9dbb570deb5df8c5535f4e7a9e6acd27bc7de32 SHA-256: 152c1c139e9509ab2ea55d3ed2629280b97a07ed77ecff62f965a5599254d9ce
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious URL, identified as a redirector for SEO link farms. The document body, though heavily obfuscated, contains text related to birthday wishes and the malicious URL, suggesting a social engineering lure. The ML classifier strongly indicates maliciousness, and the PDF structure points to a link farm used for phishing or malware distribution.

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=happy+birthday+dad+wishes+video In PDF document text
    • http://files.intempodanceensemble.org/uploads/1/3/1/8/131871874/wedodav-tipuzajuvetidiw-luwotapupivegus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0460/3694/3007/files/11993036136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9997/1999/files/89697318121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0556/6366/files/bivuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6022/3382/files/77012919945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5320/3102/files/xivirelisuberilanasatif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6439/1845/files/pozijomevewatun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/dovepaxobomevume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/53682014066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejozetopugewafapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/67568161675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9317/1103/files/16451164516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4142/1472/files/blogger_template_creator_online.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 4

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6478 5052 bytes
SHA-256: 9819d5d1b5c76ef4b474113d4a573b2f65afe6a5e3c6a1c1c4ca10717d000ac9
font_01_sfnt_off000075ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CA 10088 bytes
SHA-256: 74f2ebfa87527c4755e4e7d729011d068fb37dd6a31af14ed257072cbbd49e46
font_02_sfnt_off00009865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9865 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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