Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b44500a90fb927b…

MALICIOUS

PDF

40.8 KB Created: 2020-08-19 20:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5a860e20e5c822ae88ea6278053ef2fd SHA-1: c1cdb79db646f13530ae03301e28740f27ab60fa SHA-256: 1b44500a90fb927be6ebfdc53ff94d89b2eff0966e4c0e1f18b955765e4433e1
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a lure for a 'Whatsapp update for windows phone' and embeds multiple links. One of these links, 'https://ttraff.ru/pify?keyword=whatsapp+update++for+windows+phone', is identified as a malicious redirector. The document also contains a large number of links to PDFs hosted on cdn.shopify.com, likely part of an SEO link farm to improve search engine ranking for malicious content. No scripts were extracted, but the presence of the malicious redirector and the link farm strongly suggests a phishing or social engineering attack aimed at directing users to malicious infrastructure.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=whatsapp+update++for+windows+phone In PDF document text
    • http://vupiv.foxfieldrecoverymission.org/uploads/1/3/2/3/132302868/kanipuwubug.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/1/0434/1510/9797/files/design_of_brick_masonry_structures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/pivuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2794/5889/files/marchen_awakens_romance_anime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1068/6113/files/doodle_god_cheats_artifacts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3986/4485/files/doleraki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0949/9558/files/alchimistul_paulo_coelho.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/vowaxuzopuvanedipov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/stihl_chainsaw_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/99376152244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/52650046441.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_off0000629c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629C 5204 bytes
SHA-256: 9b334f211b2e47e1b3263803cef717adbb196bd085a321abb394dac619a7c2d5
font_01_sfnt_off00007460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7460 9920 bytes
SHA-256: ab207f29b5d61a0a1882e9ff70ed32c4bf7d0fc7c663731879b2738facba2d98

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