Malicious PDF — malware analysis report

Static analysis result for SHA-256 016ec1c7f726dbc2…

MALICIOUS

PDF

47.8 KB Created: 2020-08-16 20:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6b25bd9038765a2c07b0eafea933fef SHA-1: 42ca2c55ed0956058254d5cfe3a1ce17aff2a6f7 SHA-256: 016ec1c7f726dbc26c4b2d3c95dff566974e7c2d740f830137d96dc2a62c5346
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector. The document body, though obfuscated, contains the URL 'https://ttraff.com/pify?keyword=being+there+screenplay+pdf', suggesting a lure to download further content. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent 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.com/pify?keyword=being+there+screenplay+pdf
    • http://divuxum.simplyamazingskincare.com/uploads/1/3/1/8/131857419/2907854.pdf
    • http://wobifakij.hipsterwatersling.com/uploads/1/3/0/7/130775934/6758286.pdf
    • http://files.perfectlyimperfectperfectionist.com/uploads/1/3/1/4/131438570/rewalipem.pdf
    • http://files.readingisasuperpower.com/uploads/1/3/1/4/131454090/vekiboxiz_xuwefu.pdf
    • http://dedadum.slimakengines.com/uploads/1/3/1/4/131408061/sajuweze_natikojukuve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/zexivefufenarekonevipe.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7555/files/xagolores.pdf
    • https://cdn.shopify.com/s/files/1/0438/0937/4365/files/trox_sound_attenuator.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/30666219267.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28821374719.pdf
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/vasafurakoxodo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6442/5634/files/binding_site_optilite_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/10030512861.pdf
    • https://cdn.shopify.com/s/files/1/0429/3135/5807/files/xositegosepave.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/65286306075.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_off00007ba3.bin
b4061e2baf53b31c585d2553a75639ad59dd1129a2d262a2dc2ad984603669e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BA3 5568 bytes
font_01_sfnt_off00008e93.bin
0ad735c95fd99f1f36b22b535bc557a658061c5a71aa62a91b8ff7637e83da07
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E93 10544 bytes