Malicious PDF — malware analysis report

Static analysis result for SHA-256 399b2f993bc8cba4…

MALICIOUS

PDF

49.7 KB Created: 2020-08-18 14:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 71ef61bb6a730ba4c5e4ee4736048d76 SHA-1: d4a4b8441c4275b68c54d982a5dabd18510627ef SHA-256: 399b2f993bc8cba442278492440dd51eccafbfaa18dc52e3cef70a1fdd921f8f
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary malicious redirector URL identified as https://ttraff.ru/pify?keyword=tamil+album+video+songs++hd+720p. This indicates a likely phishing or scam attempt, leveraging SEO techniques to distribute malicious links. No scripts were extracted, limiting the analysis of specific execution behaviors.

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=tamil+album+video+songs++hd+720p In PDF document text
    • http://files.faithforher.com/uploads/1/3/1/6/131606260/xugepazu.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/1/0431/1567/5815/files/rome_2_patch_18.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0881/1427/files/poulan_weed_eater_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/hiv_aids_awareness_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/avifauna_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4542/8122/files/vowenitasajixitaxanezuwos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/68227428906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1615/1455/files/gosolosunixajipejat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5746/3971/files/56772790606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0688/6051/files/bolebovegimasoregoger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/64238793182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/cabalistic_encyclopedia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1603/6249/files/easy_classical_guitar_songs.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F4 5780 bytes
SHA-256: ed4c12b6e0f165de51977dec89d7553fa3dc001be0b5a8f252a369af633ae21f
font_01_sfnt_off0000887c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x887C 15908 bytes
SHA-256: 78a47b98406d4b68e72645e14cd9a4a224cc6f4cb931cd0cdf1331d523614157