Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a95e20467f5515d…

MALICIOUS

PDF

43.4 KB Created: 2020-08-16 12:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9772cfd086f23a0ba0263a0903957f5b SHA-1: a50182d0fb3ab9750d7b544fa92b7be882abd4e6 SHA-256: 6a95e20467f5515da82075437834ad0eb9bb3c70c545858b7844723907f0bc13
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one critical heuristic firing indicating redirection to known malicious infrastructure. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=simplejdbctemplate+batch+update+example, which is also flagged as a malicious redirector. The presence of numerous PDF links suggests a link farm or a phishing attempt to drive traffic to malicious sites.

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=simplejdbctemplate+batch+update+example
    • http://files.southatlantacherokees.com/uploads/1/3/1/6/131607662/bekiguwijifuguraneni.pdf
    • http://sulamox.jewelsofafrica.org/uploads/1/3/0/9/130969858/7453689.pdf
    • http://jupobidol.donsellmaninvite.com/uploads/1/3/1/4/131438667/9056228.pdf
    • http://files.hookah-corner.com/uploads/1/3/1/4/131438202/5602918.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/96358656638.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/73801881330.pdf
    • https://cdn.shopify.com/s/files/1/0430/7622/3129/files/33418315377.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/18555917967.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/retugibulorujesa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3243/5093/files/how_to_mod_fallout_4_vr.pdf
    • https://cdn.shopify.com/s/files/1/0428/6133/0591/files/76305667030.pdf
    • https://cdn.shopify.com/s/files/1/0432/2964/2916/files/85720782492.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9158/files/bowlers_journal_ball_guide_2008.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0591/files/98283725611.pdf
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/ancient_history_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/5911/6182/files/dadip.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000617d.bin
dc24195190d85f5f4772a3273b64047a6281a37be69d2a4621172c52fb01ffae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617D 5428 bytes
font_01_sfnt_off000073d0.bin
2e0c908cca673c5f49a374cda13387e64527c755a71a846d1005ee4e00db43ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D0 14040 bytes

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