Malicious PDF — malware analysis report

Static analysis result for SHA-256 656d7278f6eefdd5…

MALICIOUS

PDF

96.4 KB Created: 2020-09-01 02:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e521172f1011ac57cf3621f238ab8dd SHA-1: ced9071d7e1a5e9dfa2665228e6d49ed953ac06a SHA-256: 656d7278f6eefdd5e313ceb3dd9a7cbf92dfa6b0806c8bb9fa910b1f165de59a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links and a document body that attempts to impersonate an airport manual, likely as a lure. The primary malicious indicator is a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The ML classifier also strongly indicated maliciousness.

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=glasgow+airport+aerodrome+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_29722c605d6244a189447036c365eea1.pdf
    • https://static.usrfiles.com/ugd/cac9e4_5052c97bfef443b184a26d721e516fcb.pdf
    • https://static.usrfiles.com/ugd/a4e402_6b74b89a1842498388f8efbd8da42d0f.pdf
    • https://static.usrfiles.com/ugd/b8c837_b29d2b36479d43949204444ddf123e66.pdf
    • https://static.usrfiles.com/ugd/8b4172_ff257c4c41f64a27b4cdb89eb60edf48.pdf
    • https://cdn.shopify.com/s/files/1/0447/8743/3623/files/52983254669.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5013/files/pafenajularurukogud.pdf
    • https://static.usrfiles.com/ugd/7baf93_9e7b6ea08279451b97dd7f0f3022ee64.pdf
    • https://static.usrfiles.com/ugd/52b593_9b1b5ba0792f4064badf63897b7225b9.pdf
    • https://static.usrfiles.com/ugd/e8506d_f046939456a84feab76696d049a1be09.pdf
    • https://static.usrfiles.com/ugd/73cb9e_73e17bd58e7a4ff7a297e295c1bfe665.pdf
    • https://cdn.shopify.com/s/files/1/0447/7108/2391/files/root_cause_analysis_report_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/5788/8932/files/nuwulotozosenekuzumejove.pdf
    • https://cdn.shopify.com/s/files/1/0437/9443/2161/files/myrtle_beach_weather_15_day_forecast.pdf
    • https://cdn.shopify.com/s/files/1/0462/2771/8293/files/kant_s_categorical_imperative.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/89466520857.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_off00012c74.bin
7ef10cb3646205fa6ce7b12f00775a0f94e01f1dbc5c347968cf23e3dab58299
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C74 5400 bytes
font_01_sfnt_off00013ed7.bin
127d3c22ce064c6b6d829ef0c9b2b50aead2181b3ea96840916674a283d5186f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13ED7 16824 bytes