Malicious PDF — malware analysis report

Static analysis result for SHA-256 7305ff3fffbee5d8…

MALICIOUS

PDF

63.6 KB Created: 2020-08-03 14:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dabfd39215fd757d5003f31bd8d3e150 SHA-1: e445a98eacfc158016d3a78b99f30f417a7d2e13 SHA-256: 7305ff3fffbee5d8735e889b65e3c62799d050a6dcd99deafbeb5905f2a78168
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, and exhibits characteristics of an advance-fee scam lure. The document body, though heavily obfuscated, contains URLs that are likely intended to lead the user to malicious content or phishing pages. The presence of multiple external PDF links suggests an attempt to create a link farm or distribute further malicious content.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=consequentialist+ethical+theories+pdf
    • http://files.visitwesternheritagecenter.org/uploads/1/3/2/7/132710601/rediruj.pdf
    • http://files.averagejoeministries.org/uploads/1/3/1/6/131636725/sofepurotavamiduxi.pdf
    • http://files.jeffreyprimeaux.com/uploads/1/3/0/8/130814219/rujidedepel.pdf
    • http://files.qtdinternational.org/uploads/1/3/2/6/132681767/7364064.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4633/8709/files/30269443728.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/46037063262.pdf
    • https://cdn.shopify.com/s/files/1/0431/2878/3002/files/24664728424.pdf
    • https://cdn.shopify.com/s/files/1/0431/8704/4515/files/kokelezexemijusobenarire.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2089/files/western_union_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0437/2214/5943/files/92449987593.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3448/files/33976889950.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/kovoketasanos.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0632/files/naropikokakumunupusomaxax.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/91619720573.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/jcameron-_key._asc.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_off0000bba6.bin
14b506a00039968d735f5d0ad34bad6b8c3fa8dbaeafd3275ecb74316ca89151		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBA6 5272 bytes
font_01_sfnt_off0000cd88.bin
38d17c30b7e9cd34db443901ae930874a5867727b8fd432b0dfa19d63778c364		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD88 10656 bytes

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