Malicious PDF — malware analysis report

Static analysis result for SHA-256 70cb7c8102f3c57a…

MALICIOUS

PDF

64.6 KB Created: 2020-08-09 06:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e699d33a38c94b40011b44bb07327cf SHA-1: 72a18289c0da6c7a32ae2375579ab23dab2e8534 SHA-256: 70cb7c8102f3c57a8196288cd3a221ab8ddb4ddcd6fd263628a694ee1907e879
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary goal is to lure the user to a malicious site, likely for further exploitation or credential harvesting. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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=frightful+s+mountain+chapter+7+pdf
    • http://wegovur.bbailey24.com/uploads/1/3/0/9/130969060/3d00064f3.pdf
    • http://lugapara.nicecurb.org/uploads/1/3/0/8/130873876/3161449.pdf
    • http://files.jikidenreikipathways.com/uploads/1/3/1/3/131398091/2158272.pdf
    • http://files.goaskalex.org/uploads/1/3/1/3/131381109/vurega_parumusuleda_kaxaxujatiw_fuzuwudesef.pdf
    • http://jewopot.diamondedgejewelers.com/uploads/1/3/1/3/131380429/4446367.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67331216746.pdf
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/79367546809.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/vimimuxizemutun.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/wofapomodegusijapevasez.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27947700243.pdf
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/74417029112.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/siriramaxirosamuxufav.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3610/files/31825897619.pdf
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/jeppesen_airframe_textbook_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3061/files/74100055504.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/98215838028.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/17029814697.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b25e.bin
763cbb7a9857174b472a20bb5e23025822663cf0557bec3201477fd6490c51e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB25E 5484 bytes
font_01_sfnt_off0000c4e9.bin
ebb6167f03bce94b0d491dfd08c13c9f68eacd2ffa53b97a6c95a34e1ef67367		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E9 10008 bytes
font_02_sfnt_off0000e707.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 4324 bytes

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