Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e194513a5b41268…

MALICIOUS

PDF

42.2 KB Created: 2020-08-31 18:38:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 37baaa5cc375adc4a3c371ca9518f44e SHA-1: 4cad1619e95a601f2455d2b8dee5667bde5246f2 SHA-256: 3e194513a5b41268e9e94d48a90262899d408c88e147fff9f529075f6873cd5d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was identified as malicious due to a high ML classifier score and the presence of a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/wix?keyword=executive+summary+template+ppt+free, which is also listed as a malicious redirector. The file also exhibits characteristics of a PDF link farm, with numerous embedded links pointing to various external resources, many of which are benign but likely serve to obscure the malicious intent.

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/wix?keyword=executive+summary+template+ppt+free
    • https://static.usrfiles.com/ugd/58a813_ea97891bdd3b42cb8766b92f6824f10c.pdf
    • https://static.usrfiles.com/ugd/32acb1_6fe6fc9c15ef48dfb6e7b1d993ad5fd6.pdf
    • https://static.usrfiles.com/ugd/b8c837_99b0b72cad1e4a6c9c1a156e30f12876.pdf
    • https://static.usrfiles.com/ugd/868401_0aefcb3a54f04f35bcf5908d09bf0f86.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0ebfcabce4c4cf0a162a5a8fcf1f344.pdf
    • https://cdn.shopify.com/s/files/1/0430/0367/4785/files/vudojanajid.pdf
    • https://cdn.shopify.com/s/files/1/0433/4305/2953/files/51203044930.pdf
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/90054117035.pdf
    • https://cdn.shopify.com/s/files/1/0439/4916/2654/files/cholesterol_diet_plan.pdf
    • https://cdn.shopify.com/s/files/1/0462/7372/4576/files/46597009831.pdf
    • https://cdn.shopify.com/s/files/1/0433/7552/6042/files/kitchenaid_mixer_attachment_pack.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3298/files/redemption_at_hacksaw_ridge_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/bakuveraduwerojakom.pdf
    • https://cdn.shopify.com/s/files/1/0430/5358/0437/files/avg_internet_security_2017_serial_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4637/files/mogwai_m_c3_bcnchen.pdf
    • https://cdn.shopify.com/s/files/1/0451/9487/0935/files/5047367606.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/lejiluvurazewobetunamifi.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/aspiration_pneumonia_treatment_guideline_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/14634016634.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_off00006597.bin
ac2f32d69691270f06fce2c377b1d2023d6d1b17a64493e4f8a41909670ff588		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6597 5348 bytes
font_01_sfnt_off000077c4.bin
5cc1a1f41e5bca26a6fd164d499620d6cb2bd89d960465fdc9f18554baa2fd74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C4 10544 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.