Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb1834bce152421…

MALICIOUS

PDF

39.4 KB Created: 2020-08-21 18:40:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed1dd8da89ad705ff8dffe4be86963a1 SHA-1: 0fbe2a6894c3708f565a8d3d8158739740f7d3ce SHA-256: dcb1834bce152421c334f236a44e6658ee68fdd08994b49236552f08aee18da4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though partially corrupted, includes the phrase '2015 cadillac ats cue manual', suggesting a lure to entice users to click the link. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources.

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=2015+cadillac+ats+cue+manual
    • http://bidakevu.sonsetministries.com/uploads/1/3/0/8/130814411/zibesupikofediv-dawitemunipixi-jabirorijerofon-wozusebidewozuk.pdf
    • https://cdn.shopify.com/s/files/1/0463/3447/6449/files/satofuduwufe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/carrier_chiller_troubleshooting.pdf
    • https://cdn.shopify.com/s/files/1/0433/0641/8331/files/catherine_laborde_trembler.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/nefirasilelapejesabebugor.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5565/files/46300362527.pdf
    • https://cdn.shopify.com/s/files/1/0447/2619/0234/files/dirixov.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/belt_bucket_elevator_power_calculation.pdf
    • https://cdn.shopify.com/s/files/1/0437/2417/7557/files/zovepinipedejobagewar.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/96945409154.pdf
    • https://cdn.shopify.com/s/files/1/0432/6116/5723/files/fatinonefetebekomazeka.pdf
    • https://cdn.shopify.com/s/files/1/0433/6192/7318/files/vutaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3197/7370/files/40420096552.pdf
    • https://cdn.shopify.com/s/files/1/0457/7273/4630/files/62842181267.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_off00005b2c.bin
62e00d20c899d72a54c7696aa1863b67d90ca5aaebe3ae62a7fbac3a874199e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2C 5344 bytes
font_01_sfnt_off00006d40.bin
9e3cb51e4ef78f3968ef4345d8404ab2d87f5f5fe19ca4f655da5a4d489d56c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D40 10508 bytes