Malicious PDF — malware analysis report

Static analysis result for SHA-256 840f490cc73d4a99…

MALICIOUS

PDF

41.4 KB Created: 2020-08-16 22:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7cd8f4e445e9adeab8b18ab7ebeae51 SHA-1: e238d3992d92b9ec820fdfe8bebbbc81ef792258 SHA-256: 840f490cc73d4a99269f4470d2015af6a5c8669b3979a82922406714ad9e6ba0
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=cue+card+printing+template' which is flagged as malicious. This suggests the document is designed to redirect users to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted, but the presence of numerous links and the malicious redirector indicate a phishing or content-luring attack pattern.

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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=cue+card+printing+template
    • http://files.elizabethmphillips.com/uploads/1/3/1/4/131455475/d9ef14ba3868157.pdf
    • http://files.stahlmennonite.org/uploads/1/3/1/8/131856330/4e355.pdf
    • http://files.revotechnologies.net/uploads/1/3/0/8/130813768/ladager.pdf
    • http://files.professionalcapitalpartners.com/uploads/1/3/1/4/131438766/4121815.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6624/4764/files/87736582570.pdf
    • https://cdn.shopify.com/s/files/1/0435/3438/5303/files/stewart_calculus_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/cmd_prompt_commands.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/nabige.pdf
    • https://cdn.shopify.com/s/files/1/0433/0812/2280/files/8664808998.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/the_40_year_old_virgin_123movies.pdf
    • https://cdn.shopify.com/s/files/1/0445/9390/5828/files/tazuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/4587/8950/files/21370108609.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/is_cs._money_legit.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4976/files/12084476948.pdf
    • https://cdn.shopify.com/s/files/1/0428/8482/5247/files/20727611227.pdf
    • https://cdn.shopify.com/s/files/1/0434/5092/5223/files/biochemistry_mcq_books_free_download.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/
    • https://cdn.shopify.com/s/files/1/04
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064df.bin
6dab8ad9519f708b56e2d0a759746e7a2441729efa245fba1d9810b8329d1c5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DF 5120 bytes
font_01_sfnt_off0000762d.bin
8dc9c023b799bfb86b82476355b89743027e16e8c575675ade78bec562114fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762D 10192 bytes

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