Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14da2637f6a0124…

MALICIOUS

PDF

49.1 KB Created: 2020-08-07 13:59:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30d3680ecca1173a8ed25a048e2d0fb5 SHA-1: a0e0d97458311ad403bc7b18e246bb764b4237ce SHA-256: c14da2637f6a012429e8b418c055e5f277ffbf5e543365489e0b38b3eb03b240
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1071.001 Web Protocols

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to potentially harmful content.

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/pify?keyword=basic+ekg+refresher+pdf
    • http://files.seiinc.org/uploads/1/3/1/1/131163683/nupijozososasisija.pdf
    • http://files.lancarelloenterprises.com/uploads/1/3/1/3/131383456/5615402.pdf
    • http://files.mtcruiseandtravel.com/uploads/1/3/0/7/130775357/4339800.pdf
    • http://files.lynnobrienmusic.com/uploads/1/3/1/4/131437308/36cbcf.pdf
    • http://files.magidome.com/uploads/1/3/0/7/130774990/7e2411f.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1621/files/houghton_mifflin_math.pdf
    • https://cdn.shopify.com/s/files/1/0433/7719/7221/files/jijabulakevojafarapi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/vipamubaminonugezodere.pdf
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/faxevixifoxadidokupu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/zoritekiwanitewijojufeve.pdf
    • https://cdn.shopify.com/s/files/1/0430/9352/4637/files/66245891013.pdf
    • https://cdn.shopify.com/s/files/1/0436/2482/4995/files/60703542870.pdf
    • https://cdn.shopify.com/s/files/1/0433/8457/0019/files/sajumadibafumo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1369/1799/files/90918601050.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kupenase.pdf
    • https://cdn.shopify.com/s/files/1/0437/2358/7733/files/xakepeturatotiwoximeboz.pdf
    • https://cdn.shopify.com/s/files/1/0435/3651/5224/files/zamokibabajit.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_off00007799.bin
f75a2c20be8afadb67cc7633e9dff1480b5ee4d88b9d341000d4c3b15580ae27
pdf-font-stream PDF embedded font (sfnt) at offset 0x7799 5500 bytes
font_01_sfnt_off00008a4f.bin
f21bd042e94d3d7c9e4afe37320ac5883569f230c89a41ad2af83607ce21e8cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4F 14368 bytes