Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1c487bc070b60ee…

MALICIOUS

PDF

50.2 KB Created: 2020-08-10 04:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 374293bd66dd13d29be932ea09f3d0eb SHA-1: 29542503e538c2f91cf0ee08a7d01c65a04ebb4d SHA-256: c1c487bc070b60ee370bace4fd4c4be5d0df9e2f3bb167dbbe7605a0b8299a80
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link to 'ttraff.cc' is identified as a malicious redirector. This suggests the document is designed to lure users into a link farm, ultimately redirecting them to malicious content. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted from this sample.

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=an%25C3%25A1lise+de+riscos+ambientais+pdf
    • http://files.yellowsubdownunder.com/uploads/1/3/0/7/130739174/lanudiraj_witijawezomu_figamoxus.pdf
    • http://files.kbnworkspace.com/uploads/1/3/1/1/131163943/nutapej.pdf
    • http://files.prakrutischool.in/uploads/1/3/1/3/131380845/luboxelenabus-likoxiworo.pdf
    • http://files.hillcountrybowhunters.com/uploads/1/3/0/7/130776485/b40098a64.pdf
    • http://files.theblackpoolplayroom.com/uploads/1/3/1/4/131452841/xipabewisi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/89809042970.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/savur.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8614/files/landscaping_plants_pictures_and_names.pdf
    • https://cdn.shopify.com/s/files/1/0428/2197/6220/files/74625435123.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/50175475359.pdf
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/56416541423.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/5315862042.pdf
    • https://cdn.shopify.com/s/files/1/0429/2624/3996/files/bubapideverigufuge.pdf
    • https://cdn.shopify.com/s/files/1/0433/4895/1194/files/cornerstone_biblical_commentary.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/nibixafefulodogi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/69306086706.pdf
    • https://cdn.shopify.com/s/files/1/0432/7633/7318/files/gogagowuxenopejuzejunet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7968/6549/files/22716399764.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/le_verbe_avoir_present_exercices.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007215.bin
7dfe2fc9b62cdf0f9a52cf8a6327fd83ff62597fa1ee3aca1ed558715e1e55e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7215 5452 bytes
font_01_sfnt_off000083df.bin
fdb93022c2a4fc9cf920e924ca1afb2be2fc6feb7feeca1452805e9229ea3d8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83DF 13456 bytes
font_02_sfnt_off0000ab98.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB98 4324 bytes

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