Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a2cddd3d28ef7da…

MALICIOUS

PDF

48.9 KB Created: 2020-08-06 20:54:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fddb52a31012c6277e30f6a33cfbc9e2 SHA-1: 4f440c54857ac80ad09ddeda08c933d0c3547c5e SHA-256: 4a2cddd3d28ef7daf1a01192a784bbb344403edc54933bcbaadfdef9901a58a0
194 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that is likely intended to lure the user into clicking it. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a phishing lure disguised as a document about agile development.

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=metode+agile+development+pdf In PDF document text
    • http://files.idealhome.services/uploads/1/3/1/4/131454012/5948916.pdfIn PDF document text
    • http://files.newyorkbabystork.com/uploads/1/3/1/4/131438509/zugijerori_gexawuwak.pdfIn PDF document text
    • http://files.customdecorativemetalwork.com/uploads/1/3/1/6/131606533/7529499.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/1/0438/1127/4914/files/47196926018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/9097761876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/sisuxadosaronupajakorovem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0614/7230/files/popejalalovametamasosezor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2204/0731/files/walotitofibaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9026/4742/files/denatuked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2743/9526/files/91329176953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9102/4280/files/11988202152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0222/3013/files/atom_and_molecules_class_9th_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1028/5983/files/ti89_titanium_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4276/5991/files/akuntansi_syariah_iwan_triyuwono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0604/2023/files/fofefojexedum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebedaxogatasimilore.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 5

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_off000081e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E0 5152 bytes
SHA-256: 2bd8409838b9501205e713c56f5b8067cf005a499bbc22acee08fe51eff0f258
font_01_sfnt_off0000937d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x937D 10196 bytes
SHA-256: 74ab427b41a15cf13a70fd804484e50c2c24c835b23f27207231fb425750426f

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