Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a263f785984ee6…

MALICIOUS

PDF

39.1 KB Created: 2020-08-28 10:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42f35dc1debb69e8bfdcd927b11c6c12 SHA-1: a0459624d7002a02e95ac7791d19f8fd55693548 SHA-256: 68a263f785984ee6229c0066d52f71ee76865c13d116a2ef3a7ca6e2f1bae193
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying it as a redirector and a link farm. The primary malicious URL, 'https://ttraff.com/pify?keyword=libro+formacion+y+orientacion+laboral', is flagged as a redirector. The document's structure and the presence of many external links suggest an attempt to manipulate search engine results or distribute malicious content through a large number of PDFs.

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=libro+formacion+y+orientacion+laboral
    • http://files.theitaliantip.com/uploads/1/3/1/4/131453198/2358047.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0453/9786/8712/files/north_america_political_map.pdf
    • https://cdn.shopify.com/s/files/1/0428/9871/8883/files/breau_of_meterology.pdf
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/barnes_reloading_data.pdf
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/75120141108.pdf
    • https://cdn.shopify.com/s/files/1/0435/5981/3279/files/35473701651.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/sonutefasenolupubapugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejozetopugewafapo.pdf
    • https://cdn.shopify.com/s/files/1/0447/0331/8170/files/widusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/3152232763.pdf
    • https://cdn.shopify.com/s/files/1/0433/9440/0414/files/peter_benchley_jaws.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_off00004ebc.bin
ecb88881a533c9adfedfa17350c7f7adb0117d736aa59e1ce8729c93dc63bf56
pdf-font-stream PDF embedded font (sfnt) at offset 0x4EBC 4820 bytes
font_01_sfnt_off00005f00.bin
3a1712a643d415f1629293a5d109a8bfd68198e04684d54c700b7a6637918bd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F00 10592 bytes
font_02_sfnt_off00008198.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8198 4324 bytes