Malicious PDF — malware analysis report

Static analysis result for SHA-256 037cb41f8eda5847…

MALICIOUS

PDF

38.0 KB Created: 2020-08-30 20:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 168041576a4cb262bc550aec66ff2d9d SHA-1: ce828588526a862b72b97ddd823adefe592ff24a SHA-256: 037cb41f8eda5847561e6335e4c5032a716f7775a30e9d9763050879f952c57c
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a 'money skill' lure, aligning with phishing or scam tactics. The presence of numerous external links, many pointing to PDF files, indicates a link farm designed to distribute malicious content or traffic.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=money+skill+answers+module+1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f523c3_d6ac30a65360412fa961dcf9ac57dccf.pdf
    • https://static.usrfiles.com/ugd/b8c837_0e89944775ce4cac9cbbc9645d74763d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a070c81b71a24ae6b21dd10e15ed75aa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8188/3047/files/53043626202.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2680/files/21626420000.pdf
    • https://cdn.shopify.com/s/files/1/0431/8566/8259/files/bhagavad_gita_in_bengali_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7878/5951/files/50331431475.pdf
    • https://cdn.shopify.com/s/files/1/0431/8681/5139/files/77351336456.pdf
    • https://cdn.shopify.com/s/files/1/0433/2083/6254/files/lijiku.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/finney_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0434/0842/5116/files/google_chrome_mod_terbaru_apk.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d7761434a5449a08151a7cdeeb9cc05.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbfbfd5be0ba420ca771c6cea220b29b.pdf
    • https://static.usrfiles.com/ugd/9e53d4_50c0a8e3f32343719cb56af93e2307ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff9c458bac2745cea8ec4995a6493a68.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_off000053bb.bin
45d461ba8d6122f434d5264a0ea885881de24766a30cc7d2e036ccdc72217bc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53BB 5288 bytes
font_01_sfnt_off000065c0.bin
3f3a3f48b21cb603c4d17c6e12112b3949ff16c8d571d1c5db846bf711293603		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C0 10592 bytes

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