Malicious PDF — malware analysis report

Static analysis result for SHA-256 06a0dacac30e5c75…

MALICIOUS

PDF

42.7 KB Created: 2020-08-24 14:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f6db1a324e072c846305fbc7520e072 SHA-1: 845cdf88b174eb4a9a3b40a78d980c643bec5eae SHA-256: 06a0dacac30e5c75ae1711f9098ac2a3e199e5caa717f9966b7632862e016861
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links to a redirector service, which is a common tactic for distributing malware or phishing pages. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm used for SEO poisoning or traffic generation. No scripts were extracted, but the embedded URLs are the primary indicators of 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.cc/pify?keyword=word+guessing+game+answers
    • http://damesup.norcalstma.org/uploads/1/3/1/6/131606758/5035794.pdf
    • http://files.texascenterforregionalstudies.net/uploads/1/3/1/8/131856381/29afc.pdf
    • http://files.canecreekmbc.org/uploads/1/3/0/9/130969262/guwola-vomugosiwigul-tiditawitas.pdf
    • http://files.laffertydesignplus.com/uploads/1/3/2/6/132696335/sajanebiras.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1094/0328/files/k-_lite_mega_codec_pack.pdf
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/83006324004.pdf
    • https://cdn.shopify.com/s/files/1/0435/7790/1219/files/2008_toyota_tundra_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4615/0039/files/nadaregudosetulugomedore.pdf
    • https://cdn.shopify.com/s/files/1/0438/3725/9938/files/woxibezowujeka.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bararilisubolubudikolumo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5055/files/11149497500.pdf
    • https://cdn.shopify.com/s/files/1/0430/7710/7865/files/chart_js_tooltip_format_value.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/bluestacks_2_x86_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0431/9887/3763/files/nisojibusuvekiwagu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4894/4284/files/xudalabakurebolefafepurit.pdf
    • https://cdn.shopify.com/s/files/1/0434/5017/1554/files/11826932102.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_off00006738.bin
48d26159786d71c83b59e8f9b8c3d4844e0a8a0b01384e71f3aaa0fa48b7e9cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6738 5216 bytes
font_01_sfnt_off000078fe.bin
2113fefa2ae73bc8b962a2d1f469af2d0f4267b7dcd577058917efa8b1c6a7cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FE 10844 bytes

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