Malicious PDF — malware analysis report

Static analysis result for SHA-256 3743239bbcfe34c8…

MALICIOUS

PDF

39.5 KB Created: 2020-08-14 19:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eff6bdd07fe91c44b966960f49f62d87 SHA-1: e1eb5414d070db694c60d5f13e07ec8f7bd1aec0 SHA-256: 3743239bbcfe34c8f58c7a03f4ae1005ad2079fd4d61219328fb5edce91cb7d6
152 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.cc. This indicates a likely attempt to lure users to malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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=bind+parameters+in+oracle+reports+example
    • http://files.518nextlevel.com/uploads/1/3/1/3/131384249/bawam.pdf
    • http://files.bittermallow.com/uploads/1/3/1/8/131871453/896651.pdf
    • http://papikigo.willdeandesigns.com/uploads/1/3/0/7/130776553/voduvorozareju.pdf
    • http://files.drjerryjacobson.com/uploads/1/3/1/4/131411857/vopewokogu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9095/1848/files/9n_ford_tractor_parts.pdf
    • https://cdn.shopify.com/s/files/1/0449/4458/8959/files/trastornos_alimenticios_monografia.pdf
    • https://cdn.shopify.com/s/files/1/0436/3111/6448/files/tamizur.pdf
    • https://cdn.shopify.com/s/files/1/0429/8162/1919/files/mumoxokeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6119/files/gonofaxefewuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/24381309196.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6566/files/declaration_of_conformity_template_plastic.pdf
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/fasure.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/analisis_vertical_y_horizontal_de_los_estados_financieros.pdf
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/adenauer_novaes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0567/2597/files/nationalism_in_europe_class_10_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0440/1653/3654/files/disorilezapiteziwojiwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/sazarusoguwufe.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_off00005d30.bin
29aaccc1d9c58ba6c4d0ca4906ccaa0835988713d0ba768576adea8aafa0b2bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D30 5336 bytes
font_01_sfnt_off00006f37.bin
e2d376a85c5563d8faa7c47fce2a4b9711771348aa3e0884fd7f126565609f42
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F37 9748 bytes