Malicious PDF — malware analysis report

Static analysis result for SHA-256 1540d069621e6fa8…

MALICIOUS

PDF

45.9 KB Created: 2020-08-07 20:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c4e0923008e5be3af1a34de5f91a16a SHA-1: f50390e772af4159e6431f2fe181e0d8d5e30719 SHA-256: 1540d069621e6fa8e96c08b42d1901e202fd4f8505799bca4cbd6900c74f2873
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm designed to redirect users to potentially malicious content, as indicated by the critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL identified is https://ttraff.ru/pify?keyword=new+functional+training+for+sports+pdf+download. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=new+functional+training+for+sports+pdf+download
    • http://files.reefshawproductions.com/uploads/1/3/1/3/131398143/dutuzunemiroxaki.pdf
    • http://files.wbcslaw.com/uploads/1/3/1/8/131871554/6198884.pdf
    • http://files.helloworldwerehere.com/uploads/1/3/1/4/131438474/mejefapitu-ligizuw.pdf
    • http://files.biokonstra.com/uploads/1/3/1/3/131384374/tuputopulo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/business_communication_notes_for_bba_2nd_sem.pdf
    • https://cdn.shopify.com/s/files/1/0428/2430/2759/files/vopivoletigip.pdf
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/46045846842.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/kaliribafubiwodikajova.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45287622464.pdf
    • https://cdn.shopify.com/s/files/1/0433/5095/0041/files/bodepozorawe.pdf
    • https://cdn.shopify.com/s/files/1/0454/2988/3048/files/langstroth_beehive_plans.pdf
    • https://cdn.shopify.com/s/files/1/0432/8652/8164/files/man_from_snowy_river_cast.pdf
    • https://cdn.shopify.com/s/files/1/0429/3227/3319/files/98119705134.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/taponilukevilazev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45251784546.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074b4.bin
427bf5c2eba4490cd8f1ce04361d81199a356f4db10896939417d1273b61bae2
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 5384 bytes
font_01_sfnt_off00008731.bin
4d9554c1170a13bbf821b4a80579c184f3bd96e61921451c9d6924d6010c16e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8731 10276 bytes