Malicious PDF — malware analysis report

Static analysis result for SHA-256 775104ffa9f97f5b…

MALICIOUS

PDF

40.5 KB Created: 2020-08-08 22:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63e50799c32ea1f2367e06dabdc873e9 SHA-1: eab4d561222123f1371f3b79dcdc74623929595e SHA-256: 775104ffa9f97f5b8ef967ee0932ab647a01d278260785d382769fc6c375be00
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to benign Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains the text 'Peugeot partner 2005 service manual' and the malicious redirector URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=peugeot%20partner%202005%20service%20manual
    • http://damidijol.nvartistry.com/uploads/1/3/1/1/131164250/befojodubefanobuvife.pdf
    • http://jimukul.3islandsdesigns.com/uploads/1/3/2/7/132740978/kisof.pdf
    • http://files.kronicsensations.com/uploads/1/3/0/7/130740502/romevujuvafuwer.pdf
    • http://files.rinmakeup.com/uploads/1/3/1/4/131438616/96f38c8613d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/pukiwokonafidagomusowite.pdf
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/binawuwazalovitulagez.pdf
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/duzapawuneremarebatugaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/86364298700.pdf
    • https://cdn.shopify.com/s/files/1/0432/3095/3630/files/libro_amando_a_pablo_odiando_a_escobar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0449/4727/5931/files/1-_99_magc_rs3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gipal.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/5305074249.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/94293659314.pdf
    • https://cdn.shopify.com/s/files/1/0429/2437/6227/files/groovy_null_check.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3447/files/65078798636.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/vifadumijemonogubuvago.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_off00005e93.bin
b0fb9d0936862762bee53fe80bd0cf2722235ad80d1e77a77f6aff2f14d1f69f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E93 5712 bytes
font_01_sfnt_off000071fb.bin
69ac55cee66bef4301ca5c29206752397e27a6c1872c94596fb47ce08f23581b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71FB 10352 bytes

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