Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab65c7f24a6324c…

MALICIOUS

PDF

39.0 KB Created: 2020-08-21 21:06:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a8af7b5b45291eaa539bb6ecc740d58 SHA-1: 02b6fa6e6ec77862805a5d1a16ed40a2dd322d5f SHA-256: 1ab65c7f24a6324c76fe4924aed43299943d9d8ea9c565f00fa80e1c8ff9e45c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF document contains a lure promising a free incoming call app, which is a common social engineering tactic. It embeds numerous links, with one specifically identified as a malicious redirector at `https://ttraff.cc/pify?keyword=incoming+call+app++free`. This redirector likely leads to a malicious payload or phishing page. The document's structure and the presence of a link farm suggest a delivery mechanism for malware or further exploitation.

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.cc/pify?keyword=incoming+call+app++free In PDF document text
    • http://files.uhighmusic.com/uploads/1/3/2/6/132695258/1754084.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/1/0428/1312/8863/files/49971728182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/xovukapekunibipifanuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5196/6873/files/47744341470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81858120772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0558/1211/files/factors_affecting_acoustics_of_buildings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54313135065.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5206/4155/files/bronchiectasis_nejm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1421/8151/files/56871191172.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6308/3162/files/bipajatufipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/gleanings_from_the_writings_of_baha_u_llah.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCC 5096 bytes
SHA-256: 1555879f4682ef4f4875b901fdd68a1a7e94cf497c007ae34f6c9046c432bfcf
font_01_sfnt_off00006d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D00 10192 bytes
SHA-256: 361d07eb8b22802853e11fe281fc29c11fa506c1de9b86e14c79d08df3c787ec

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