Malicious PDF — malware analysis report

Static analysis result for SHA-256 17444d0f46ba8fe3…

MALICIOUS

PDF

65.2 KB Created: 2020-08-18 14:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9a2d289f4c8d4a2acec6f78d8644838 SHA-1: 01e0ae7a26e9fc9ce0e076ac3c602dee7915b9ee SHA-256: 17444d0f46ba8fe303bb2616403b9822a7bb9b1a4d9458dce3f1838f0aeba64d
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=ase+guidelines+regurgitation
    • http://kupuga.jwschaefer.com/uploads/1/3/1/0/131070767/nupodipenamafi_wigab.pdf
    • http://files.teamzoecancersucks.com/uploads/1/3/1/3/131383892/jagadawuwune.pdf
    • http://fidudanoj.judithfan.net/uploads/1/3/2/7/132740309/4a56683502f94.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7789/3270/files/28349266118.pdf
    • https://cdn.shopify.com/s/files/1/0433/8244/0103/files/nulewa.pdf
    • https://cdn.shopify.com/s/files/1/0452/1220/5216/files/cash_book_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7952/3751/files/frigidaire_gallery_dishwasher_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/43392697199.pdf
    • https://cdn.shopify.com/s/files/1/0428/0696/8483/files/zemesolunuvokamisorirudot.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/xuzuzebaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/solidworks_2012_free_trial.pdf
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/sowolibitodaziza.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/nolubemizetowazoposozixa.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_off0000c425.bin
a97afc0a242d12ffc30efa5eb184d325f6bd224dbc25910a3e42f5a469d77c17
pdf-font-stream PDF embedded font (sfnt) at offset 0xC425 4984 bytes
font_01_sfnt_off0000d519.bin
25ca635637791b4864c8c2f636e12b0944d14961c11d26849b573f624893b35a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD519 10304 bytes