Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cf63aded093d62c…

MALICIOUS

PDF

39.1 KB Created: 2020-07-22 06:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2afbc436945fe79c61edfa8a0a96703d SHA-1: f167600eda105cb9184683f43b0775fec446c027 SHA-256: 1cf63aded093d62ce3a901f2334546a983005b93bf3463ba651f183d778ce99b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a PPE catalogue, which is a common social engineering tactic to lure users into clicking on malicious URLs. The ML classifier strongly indicates maliciousness. The document body is heavily obfuscated and likely contains further malicious content or redirects.

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.com/wb?keyword=personal%20protective%20equipment%20catalogue%20pdf
    • http://files.minigypsyhorse.com/uploads/1/3/1/4/131438036/wederes_keraxizepuk.pdf
    • http://files.irishblessingscoffeehouse.com/uploads/1/3/1/4/131406258/pejaxorasalagu-xakuv.pdf
    • http://files.myhealthaccel.com/uploads/1/3/1/3/131384173/wukasakedepe.pdf
    • http://files.irishblessingscoffeehouse.com/uploads/1/3/1/4/131406258/pe
    • https://cdn.shopify.com/s/files/1/0434/5180/9942/files/600529288.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4344/files/81946535496.pdf
    • https://cdn.shopify.com/s/files/1/0429/2070/6204/files/nukilabamameselunug.pdf
    • https://kawebori.files.wordpress.com/2020/06/3798145048.pdf
    • https://lewoxosi.files.wordpress.com/2020/06/xubupiwirafanufokepek.pdf
    • https://pateviwa.files.wordpress.com/2020/06/japabiwogifivaxajofupeko.pdf
    • https://xoxufasi.files.wordpress.com/2020/07/66321884674.pdf
    • https://toxuluva830071386.files.wordpress.com/2020/06/68981878061.pdf
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/9499870893.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/vatepasurosuzaxanaburi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/79283854716.pdf
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/mitivur.pdf
    • https://cdn.shopify.com/s/files/1/0428/7175/0823/files/xulivizimutepuduwe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6943/2230/files/musagefusaralusojemas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84312174386.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/97796999358.pdf
    • https://cdn.shopify.com/s/files/1/0427/9789/1751/files/4277724155.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b79.bin
94bb8cc0d1d94882f4c1d51f9b9c3d58ccd7b6ecf3b662fc74abf7b2d4686d2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B79 5544 bytes
font_01_sfnt_off00006e3c.bin
99b7a077efdb6b3993d643fb53e1b4530f3f2e23be1bdf118f3f9d20970d316f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3C 9520 bytes

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