Malicious PDF — malware analysis report

Static analysis result for SHA-256 06fc914abb2a183d…

MALICIOUS

PDF

43.5 KB Created: 2020-08-06 10:15:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a09ff76ae82665aa10160b03a6b93b5 SHA-1: d91a8f82b45eb7f3ecb0e6e8c9d0fdc2f5aa3e82 SHA-256: 06fc914abb2a183d0ae0d0d11db9b5570d87324b5a4ad893a39983d614df008c
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the URL 'https://ttraff.ru/pify?keyword=convert+decimal+numbers+to+binary+pdf', suggesting a lure to a malicious site. The presence of many external PDF links, including benign ones, indicates a potential link farm or SEO manipulation tactic to distribute malicious content.

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.ru/pify?keyword=convert+decimal+numbers+to+binary+pdf
    • http://files.westaucklandcadets.com/uploads/1/3/2/7/132740564/najumo.pdf
    • http://files.hellenphotography.com/uploads/1/3/0/7/130776131/1669426.pdf
    • http://vebut.forevermoreskincare.com/uploads/1/3/1/0/131070487/ec05d8edd810a.pdf
    • http://files.julesdaniels-bridaluk.com/uploads/1/3/1/4/131437474/5fbe017.pdf
    • http://files.leataire.com/uploads/1/3/0/8/130873735/bemirumaperizagovodi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0438/0285/3538/files/approximation_and_estimation.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/nesofaxitilelumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/dafigirulikaradiga.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexanenivoxepabulolud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/23651487672.pdf
    • https://cdn.shopify.com/s/files/1/0435/2425/9992/files/zezutetovalotegixus.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1563/files/bekudulalaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/83883922709.pdf
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/vuduzapejazoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/4206/3004/files/folaxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/99663204593.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eb0.bin
704acac8229bc3f180e8bf85c589f0e743a29e2577d0b2bb38feb1875cf79af2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB0 5508 bytes
font_01_sfnt_off00007158.bin
ac0b9675dbef0aa8ef4485de5c27f5484453ecbd272e4a6674ae5857b4fc77c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7158 9724 bytes
font_02_sfnt_off00009294.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9294 4324 bytes

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