Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5893c9b758efcd8…

MALICIOUS

PDF

44.6 KB Created: 2020-08-05 18:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7ec00d4d5d3265e681f1fc5d2df24c2 SHA-1: 2c36a710d1aa100ffbe493ffcf829dbddfbacea7 SHA-256: e5893c9b758efcd8aaced4f283dfeac1887c131169bf25cefaa928b9019cd133
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=functions+and+procedures+in+sql+pdf', indicating a lure to a malicious site disguised as a PDF resource. The ML classifier strongly supports the malicious nature of this PDF.

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=functions+and+procedures+in+sql+pdf
    • http://files.arewordinglife.com/uploads/1/3/1/3/131398406/nuzitine.pdf
    • http://files.birthyourwaysa.com/uploads/1/3/1/4/131438759/jepigewa_megagevajoxuja_wufuxofaj_gelisesuja.pdf
    • http://files.hugglebugragdolls.com/uploads/1/3/1/4/131482823/61de9677.pdf
    • http://wefamateb.hollywoodrobtravel.com/uploads/1/3/0/8/130813834/molofi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/99743147469.pdf
    • https://cdn.shopify.com/s/files/1/0447/9886/9653/files/general_cytology.pdf
    • https://cdn.shopify.com/s/files/1/0440/1692/6870/files/41551344319.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/gezufax.pdf
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/kevadevedenaruruwuvomum.pdf
    • https://cdn.shopify.com/s/files/1/0434/6331/1520/files/4179895373.pdf
    • https://cdn.shopify.com/s/files/1/0436/1846/7997/files/41297840611.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/77067095014.pdf
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/36759097418.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5234/files/vizirewibililebewibaxoz.pdf
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/brand_personality_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0429/6251/8182/files/94770137623.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/88526380173.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_off00006f15.bin
d9bb1b8d65cbe37fbbbbd8c3354749ceeb2f6d8ae5485e01bff3a556698441c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F15 5228 bytes
font_01_sfnt_off000080f2.bin
0cb8aeabd113b09a9a24b48b3cd2b63681c2fc6a2463a6c7526740489de646d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F2 10728 bytes

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