Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10331b11d19e941…

MALICIOUS

PDF

42.1 KB Created: 2020-08-06 21:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0da3b8d5257a117c5c7b78e9f9ee9bb9 SHA-1: 666662bc8ee104c6b3a1283ba923547d082f79a1 SHA-256: d10331b11d19e9411c322a98222394e2b773b2e85110beb138eebc7ab017be28
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 of which point to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One prominent URL, https://ttraff.cc/pify?keyword=curtain+wall+glazing+details+pdf, is identified as a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious.

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=curtain+wall+glazing+details+pdf
    • http://files.dancetolifestudio.com/uploads/1/3/1/3/131398174/fawok-mozusovov-zizuna.pdf
    • http://gapegeki.newcovenantinspections.com/uploads/1/3/1/3/131378776/d7d9e91c1b.pdf
    • http://files.pvzphoto.com/uploads/1/3/1/3/131382395/60e67765d.pdf
    • http://files.hccvermillion.org/uploads/1/3/1/3/131397927/baniladesokadag.pdf
    • http://files.sunflowersandmountains.com/uploads/1/3/0/7/130776536/dazox_kiropefemizut_nezomesojolotu_nofadivefiraz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/sepiluxipodifofupediwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/soloxugije.pdf
    • https://cdn.shopify.com/s/files/1/0433/7719/7221/files/99360091133.pdf
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/73592477556.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/vojasetuzu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0412/4580/files/wewakewog.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/random_number_1-_5.pdf
    • https://cdn.shopify.com/s/files/1/0431/4677/2646/files/texivabuvanakev.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/92469583303.pdf
    • https://cdn.shopify.com/s/files/1/0447/2075/0745/files/mysql_show_foreign_keys.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/gaxadiwifa.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/6425551519.pdf
    • https://cdn.shopify.com/s/files/1/0437/4793/4359/files/silevokunepum.pdf
    • https://cdn.shopify.com/s/files/1/0435/3189/4944/files/kotukuxot.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_off0000668a.bin
acde4d2050d68496b0f780b6cb5f4e1cbd242eb611626e0b01d7b9802a7c5493		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668A 5256 bytes
font_01_sfnt_off00007893.bin
06b48d11db6a0a2a8a5cf0cf0e256cd9ea8040075a6057dbfc78134a6c266447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7893 10076 bytes

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