Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b56862c976feb78…

MALICIOUS

PDF

41.5 KB Created: 2020-08-03 09:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d47ef7fe42bae197987a7bf35c51e6c9 SHA-1: 465beca73e89d9ffecf51b765e928f653e508d52 SHA-256: 4b56862c976feb78c88ff55948538a99f65b6184bd1910461ce43c6b6c8c9f5a
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one critical heuristic identifying it as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The primary malicious URL identified is https://ttraff.cc/pify?keyword=my+favorite+mistake, which likely serves as a redirector to further malicious content. The document body itself is heavily obfuscated and contains metadata related to its creation, but the embedded links 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=my+favorite+mistake
    • http://files.piconazarene.com/uploads/1/3/0/9/130969465/2309282.pdf
    • http://fenowo.owsleylockandkey.net/uploads/1/3/1/4/131438474/xiduril_mosumapetiz_zufawubedalej_xafabofaxufos.pdf
    • http://files.jenniferhelenadams.com/uploads/1/3/1/8/131872079/5646744.pdf
    • http://files.newskinbodyart.com/uploads/1/3/1/4/131437619/8993270.pdf
    • http://files.centraltauntonscoutgroup.com/uploads/1/3/2/7/132710601/d2a4744.pdf
    • https://cdn.shopify.com/s/files/1/0432/7751/6955/files/datiwibopazoxatakap.pdf
    • https://cdn.shopify.com/s/files/1/0429/7759/1449/files/32238685369.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/datumaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/bulova_marine_star_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/5337/5897/files/mobofibesubadid.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/dupezukanalugabuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3432/0794/files/96249422408.pdf
    • https://cdn.shopify.com/s/files/1/0440/6486/6469/files/397441795.pdf
    • https://cdn.shopify.com/s/files/1/0431/2537/5125/files/vubunakakemelula.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1969/7310/files/julumawame.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/milujowazesododuxotazu.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_off0000657f.bin
1e171be7eca550546923a86de1ae982df8a1ab2181ac22df389a5345e3321789		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657F 5112 bytes
font_01_sfnt_off000076ef.bin
e6604f222292a0361dbda3b5a2f2f843fb316358377c9df50cba2fcaa304e1dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76EF 9884 bytes

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