Malicious PDF — malware analysis report

Static analysis result for SHA-256 747d2d95b13f227c…

MALICIOUS

PDF

70.2 KB Created: 2020-08-10 06:55:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee54e4b787cd68662e2373078db68641 SHA-1: 1a0685357b4cac917fc24eafaf580b57f690e7cf SHA-256: 747d2d95b13f227c1018a1a57f395445f5c5c483ef4fa2f63eb38ff26ca16b95
152 Risk Score

Malware Insights

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

The PDF document was flagged by multiple critical heuristics for containing malicious redirector links and a large external link farm. The primary malicious URL identified is ttraff.com, which is used in conjunction with a keyword suggesting a phishing lure. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, indicating a coordinated effort 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=que+es+el+analisis+del+discurso+pdf
    • http://files.afmsupplements.com/uploads/1/3/0/9/130969297/6762465.pdf
    • http://files.holyguacalola.com/uploads/1/3/1/4/131438844/ronumutezimux.pdf
    • http://xapemoxuk.carieasteele.org/uploads/1/3/0/7/130775195/ba1594adb3b.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7350/files/18894534371.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96672573922.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8342/files/75355934277.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/cummins_isx_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdf
    • https://cdn.shopify.com/s/files/1/0438/0668/7389/files/widugupifakobotun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdf
    • https://cdn.shopify.com/s/files/1/0431/3012/6496/files/93614396025.pdf
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/muxip.pdf
    • https://cdn.shopify.com/s/files/1/0433/7179/0486/files/33286421671.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/2020_bmw_x5_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/xajoriworizabarujaduwo.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_off0000c5f0.bin
9247d6bffe5d23e0befaaf551e6e77c776e7433a7ef4ab9e6af0d19b96363e3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F0 5012 bytes
font_01_sfnt_off0000d6fc.bin
9d7862556e09b2661ef20249f5dd5ad1e3967a50ba7051d12503020a7e0bde0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6FC 11264 bytes
font_02_sfnt_off0000fbb1.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB1 4324 bytes

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