Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bfc53ca3b9177b…

MALICIOUS

PDF

49.9 KB Created: 2020-08-08 07:25:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59599f1f91b2f6ddea1934d82ca5547d SHA-1: dd10d160e6821c5b2f7947508731612f928808ea SHA-256: 62bfc53ca3b9177b14f0c96c2809ccf0bfea8501f02749fca6c368614aff0647
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL, suggesting a deliberate attempt to disguise malicious activity as legitimate content. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector URL is a high-confidence indicator of a phishing or scam attempt.

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=bernoulli+distribution+examples+and+solutions+pdf
    • http://files.enzopizarrodesigns.com/uploads/1/3/2/6/132695491/2702735.pdf
    • http://files.southbeacharts.org/uploads/1/3/1/3/131381288/ramugadopajusajolan.pdf
    • http://wajog.batonrougeorchidsociety.com/uploads/1/3/0/9/130969742/fewuginoxuj-pukij-rasuli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/80990360285.pdf
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/lofekikemudiridafudewu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/wabutuwa.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/40739084280.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/lomumixifurufi.pdf
    • https://cdn.shopify.com/s/files/1/0436/9396/5466/files/pathfinder_bestiary_box.pdf
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/sabazabilogogekugi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/12948815386.pdf
    • https://cdn.shopify.com/s/files/1/0438/3395/0358/files/free_translation_of_from_spanish_to_english.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/tazuwe.pdf
    • https://cdn.shopify.com/s/files/1/0435/3166/5562/files/11008406464.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/base64_encoded_file_php.pdf
    • https://cdn.shopify.com/s/files/1/0428/2921/7958/files/wovegeraxemoxozatovuxuzem.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000606e.bin
b6f6bc4e823469a514525ad22b389ea3048ea42ebb4d9d26c4baf7b63a25ddf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x606E 5444 bytes
font_01_sfnt_off000072d9.bin
83dbd091d569be77627b327151f7165eec072bb693bfae0eea590674bf72f377		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D9 15252 bytes
font_02_sfnt_off0000a29d.bin
fb10e5badbbf29d6a05184c763452604a6d256f7c208a2bb674868c670b14a78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA29D 16144 bytes

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