Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe5d2c37c58a99c…

MALICIOUS

PDF

46.1 KB Created: 2020-09-02 06:45:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 339c024562aa3800e0695d25b804b0f0 SHA-1: 53bec37fe73cb11c79fb6abd418e45035923e5b6 SHA-256: efe5d2c37c58a99cc6c585ce31f435d22993ed339d8b123ad42ac7f81ff838cc
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). This indicates a link farm designed to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users through deceptive links, likely leading to phishing pages or malware downloads.

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.cc/pify?keyword=vivah+film+song+hd+video
    • http://bltlly.com/159ufp
    • https://static.usrfiles.com/ugd/b8c837_9ea3d980ff6543108276bffef1ef21bd.pdf
    • https://static.usrfiles.com/ugd/1decf9_97f16fcd7d9b47e3ab0b601a7c809119.pdf
    • https://static.usrfiles.com/ugd/0c268c_6476f88276c448a586f6ee38341d6f51.pdf
    • https://static.usrfiles.com/ugd/b8c837_01629cb29dc549c5a481e2aeec0eff95.pdf
    • https://static.usrfiles.com/ugd/2f8cea_e61ea2f1aab04ed3ab4a2a46b10cf10a.pdf
    • https://cdn.shopify.com/s/files/1/0428/9013/3663/files/nubivikuxuzubemibi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/fekixoxepojifajuvavufu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45292738862.pdf
    • https://static.usrfiles.com/ugd/ad2ade_57a8af5614bb4cb2919f30c7d1adb352.pdf
    • https://static.usrfiles.com/ugd/b8c837_26450e6b92e34791a8b4ded296ad509b.pdf
    • https://static.usrfiles.com/ugd/2c7c49_99707293a9f9421aa65f0a2756de6fd7.pdf
    • https://cdn.shopify.com/s/files/1/0435/3517/1738/files/rutherford_backscattering_spectrometry.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/buvuvaxojakidegumedozaxuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/4456/8216/files/diversity_of_arbuscular_mycorrhizal_fungi.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061a7.bin
c909c043d94237c5e1470ab9f5df98776084116a3ede985a1f418be6811843f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x61A7 4960 bytes
font_01_sfnt_off0000726e.bin
b1d5b9fb14f56df702274531d3a8e16c033da5c8bde779c56a68e427c6333c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x726E 13616 bytes
font_02_sfnt_off00009db5.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB5 4324 bytes