Malicious PDF — malware analysis report

Static analysis result for SHA-256 122a50cea1db2e9c…

MALICIOUS

PDF

49.7 KB Created: 2020-08-04 16:26:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3abab39fc1035cb2ef0e4a4960ada24 SHA-1: 706114d401a0d0ebd6cfd9fba9ab7af98ac7308a SHA-256: 122a50cea1db2e9cbab431a7ac386bdbc2488a9e6b1a4c6e141c4ed5947cfc64
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically the URL https://ttraff.ru/pify?keyword=auxiliaire+de+pu%25C3%25A9riculture+fiche+m%25C3%25A9tier+pdf. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDFs hosted on various domains, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or redirection scheme.

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.ru/pify?keyword=auxiliaire+de+pu%25C3%25A9riculture+fiche+m%25C3%25A9tier+pdf
    • http://files.clovisbethel.org/uploads/1/3/0/9/130969532/8193835.pdf
    • http://files.trendupwholesale.com/uploads/1/3/0/7/130739233/ad7cb.pdf
    • http://files.myvegandish.com/uploads/1/3/0/7/130740242/gumupubib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1301/2637/files/90721712029.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6959/files/18680200758.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3814/files/93398144576.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/3069685943.pdf
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/pilerurisagovavazakeriner.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/lugugazexabun.pdf
    • https://cdn.shopify.com/s/files/1/0437/6192/6293/files/what_are_twitch_raids.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/batodelavogiwozavaxijosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3030/6203/files/vaxunutafaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatamukizulenekop.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4280/files/92311823539.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4435/files/73115472575.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_off00007ee6.bin
571f6f0d21a91ef20df87db3a4b7efa2d2a61702dd02e57a65844357ddc3aa3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE6 5416 bytes
font_01_sfnt_off000090ee.bin
a651227d6ebe75c3d8fa36d89aad4a83621d066f3a033e2e867e875768aaedaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90EE 12356 bytes

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