Malicious PDF — malware analysis report

Static analysis result for SHA-256 7adaf3c6b25c9364…

MALICIOUS

PDF

52.3 KB Created: 2020-08-28 05:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a60911bd3cb11e3e19c55966136d083 SHA-1: 23d913869e97ad1124f968c7ed916a0e326e169c SHA-256: 7adaf3c6b25c9364e2a704985c5061b1a40359b547a6e97ca68418dc9666769f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document also exhibits characteristics of a link farm, with numerous embedded links to external PDFs, some of which are hosted on potentially suspicious domains. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest an attempt to direct users to malicious content, potentially via a spearphishing attachment vector.

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=the+hunting+party+album
    • http://files.macombcountymga.com/uploads/1/3/1/3/131397927/155680c3.pdf
    • http://xibisaxe.beckeras.no/uploads/1/3/2/6/132681737/b9001.pdf
    • http://ganapik.ararted.org/uploads/1/3/1/4/131482975/079e0c26fe.pdf
    • http://files.brancaleonifestival.com/uploads/1/3/0/7/130739021/2853692.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/4130/8319/files/6127395477.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4992/files/practice_anatomical_terms_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0451/0393/9737/files/workability_of_concrete_by_slump_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/72660314533.pdf
    • https://cdn.shopify.com/s/files/1/0433/5560/3094/files/transformers_prime_prowl_toy.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/jinamegawamusugolejuzide.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/xibusamire.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/bakiwez.pdf
    • https://cdn.shopify.com/s/files/1/0437/0432/0154/files/android_9_huawei_mate_20_lite.pdf
    • https://cdn.shopify.com/s/files/1/0429/0219/2287/files/16611252537.pdf
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/45405235707.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/41839882764.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/22242581530.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_off00008e50.bin
610f6b23aab04eafa1081bc0d4b6119ec6ee7acdb0385f8ee29abe77105543d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E50 5244 bytes
font_01_sfnt_off00009ffc.bin
68d5910344c01762ce54e973bdceb90a411263bf7fb45ae6c198e9377b4dfe82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFC 10636 bytes

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