Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d05bfb543194ae3…

MALICIOUS

PDF

43.7 KB Created: 2020-08-12 05:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e281a83c0cd66c27950277366c3c6bfe SHA-1: 44f02344bc0971218a0333467b2c26c52975b32f SHA-256: 2d05bfb543194ae3306c7b8a2e97fe5d29c508e33efbcba0fc9bb3fb3ab0735b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a helpful resource for Microsoft Excel formulas. This indicates a phishing or social engineering attempt to direct users to malicious infrastructure. The PDF also contains a large number of links to other PDFs hosted on Shopify, likely for SEO manipulation to improve the ranking of the malicious redirector. No scripts were extracted, but the presence of the malicious link and the SEO link farm heuristic strongly suggest a 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.com/pify?keyword=microsoft+excel+2020+formulas+and+functions+pdf
    • http://juvogan.michelle-peterson.com/uploads/1/3/1/3/131398125/6664248.pdf
    • http://wexog.conjureknits.com/uploads/1/3/2/6/132681670/cc90ccb.pdf
    • http://xepux.creswickfnc.com/uploads/1/3/1/8/131871453/487147f101.pdf
    • https://cdn.shopify.com/s/files/1/0448/1577/7954/files/coloriage_automne.pdf
    • https://cdn.shopify.com/s/files/1/0434/1045/6730/files/e9_b2_81_e8_82_83.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6695/files/sedentarismo_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/7165/9414/files/limarigunefudixo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/xigexolovegomivapomej.pdf
    • https://cdn.shopify.com/s/files/1/0432/2040/2337/files/93289717606.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/tuwuvamatusupedafat.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/apc_ups_650va.pdf
    • https://cdn.shopify.com/s/files/1/0432/2276/1635/files/geribexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/breastfeeding_who_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/3848/1311/files/lemelorimekada.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/42435265650.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_off00006a6e.bin
fdf0372c331636ac06ce83258cdf0a5e2b34f131fb46bd1ea23a4731e595334a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6E 5648 bytes
font_01_sfnt_off00007d91.bin
d904c5c5b8176ed4ffbff0ad6267e51407b29396e073726d463121579214fa82
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D91 10532 bytes