Malicious PDF — malware analysis report

Static analysis result for SHA-256 e70c076673addbbe…

MALICIOUS

PDF

43.6 KB Created: 2020-08-12 15:36:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6e45311c38e5c62b3ea27574f9440ed SHA-1: 4523299744987875aae3e188f5424c4d6e5cf930 SHA-256: e70c076673addbbe9c8d7eb0d7b7b84755f72e5212a6450535e94afd3382ed2e
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=escmid+guideline+diagnosis+and+treatment+of+acute+bacterial+meningitis+pdf`. This indicates the document's primary purpose is to redirect users to malicious sites. The presence of a large number of external PDF links, many hosted on potentially compromised or low-reputation domains, further supports a link-farming or redirection attack. No scripts were extracted, limiting the analysis of further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=escmid+guideline+diagnosis+and+treatment+of+acute+bacterial+meningitis+pdf
    • http://jufiri.ikmchauffeurs.com/uploads/1/3/2/6/132681670/7314c21d888c06.pdf
    • http://jofunepik.glassfloatproject.com/uploads/1/3/1/8/131856917/657918.pdf
    • http://files.whatthesaintsknew.org/uploads/1/3/1/4/131453436/votukapopezufuxuji.pdf
    • http://zizovoj.jillwongphotography.com/uploads/1/3/0/7/130775484/gemibaruxeduxib.pdf
    • http://files.racing-pigeon-media.com/uploads/1/3/0/9/130969206/nopanozawibapi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8647/1587/files/phytoremediation_technology_for_wastewater_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/93233520737.pdf
    • https://cdn.shopify.com/s/files/1/0434/5715/1142/files/rojudovasajeluxexaraguvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5202/3458/files/97341675041.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/wiriderafuzi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7593/5135/files/nejesuxivumimaluwuva.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kewosa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5815/7982/files/10592441494.pdf
    • https://cdn.shopify.com/s/files/1/0432/2823/3883/files/whirlpool_duet_washer_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6169/6925/files/43220775577.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/58899288503.pdf
    • https://cdn.shopify.com/s/files/1/0431/7039/8357/files/injective_surjective_bijective_functions.pdf
    • https://cdn.shopify.com/s/files/1/0429/1103/9655/files/xigupolabowowidifon.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_off00006aeb.bin
78d779d505ceb83867429f4e5d000ee5e872897f54aa4208983d194ccd4ff9f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AEB 5572 bytes
font_01_sfnt_off00007dbd.bin
53950f4c6e3a9cdb5f742cdecc477e9f0992a2d98fdb3f6b3ea12493763d2209
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DBD 10288 bytes