Malicious PDF — malware analysis report

Static analysis result for SHA-256 622e714b2e38bcc2…

MALICIOUS

PDF

130.3 KB Created: 2020-08-02 13:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 425c443d709b656253b98ee9c7962c98 SHA-1: c7572e866d135e744e348eed7dfcf91c473eee7e SHA-256: 622e714b2e38bcc2f3050f05aa834360553a964878f8bd09ce358b06a02bd6d5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains a URL that matches the primary malicious redirector. This suggests the document is part of a link farm designed to distribute malware or phishing 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.cc/pify?keyword=engineering+economy+7th+edition+pdf
    • http://files.athenas-owl.com/uploads/1/3/1/3/131381681/2574711.pdf
    • http://files.piecedoccasion.net/uploads/1/3/1/1/131163927/9c0811b562c5234.pdf
    • http://files.paulalozar.net/uploads/1/3/0/7/130739318/5c15f7f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8419/3697/files/90620959047.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/7743984453.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/44117979584.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/32570065476.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/99661843890.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0226/files/tiwozajilal.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/90360043112.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9817/files/kejarotigukobuwowivomope.pdf
    • https://cdn.shopify.com/s/files/1/0430/2284/4067/files/79454515778.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/jenopukamewanupur.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4565/files/sewevogitosibuwufojote.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3071/files/59238902810.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/16709606189.pdf
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/nutajojunemu.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_off0001b1b3.bin
ae146c3122d1b6833d1670564aa4428f55a27c7040b25eb4509b01967893fb7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1B3 5288 bytes
font_01_sfnt_off0001c3a9.bin
0d55a4db456790b354c1621756bc9bad3cc933a5e7a6bacbba58185d814a28cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3A9 18032 bytes