Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a6a786f6db121d0…

MALICIOUS

PDF

41.5 KB Created: 2020-08-16 22:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5e5563a3afa9a6cdb79ace8f5010557 SHA-1: 4c35d9e8fba42a50349496ea3a96844ca56e17a2 SHA-256: 5a6a786f6db121d0c54b68549fe2fac69cd81d805c98bb47b93d868c2aeaa1d5
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are hosted on Shopify and appear to be part of a link farm. One prominent link, disguised as a 'Call of Duty Mobile' download, redirects to malicious infrastructure at ttraff.cc. This suggests a phishing or scam attempt designed to drive traffic to potentially harmful sites.

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=call+of+duty+mobile++for+android
    • http://files.theberryfarmandorchard.com/uploads/1/3/1/1/131163684/6937350.pdf
    • http://wiboka.lizamoscatelli.com/uploads/1/3/2/6/132681352/32ef8a5fb3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/dobifemowip.pdf
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/51960065675.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuwofomakilaxenifotet.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6605/files/vaxipemusixuw.pdf
    • https://cdn.shopify.com/s/files/1/0437/0071/5674/files/miracle_in_cell_no._7_yts.pdf
    • https://cdn.shopify.com/s/files/1/0437/3233/6792/files/cariotipo_humano.pdf
    • https://cdn.shopify.com/s/files/1/0434/1465/1038/files/bejiparejibikaxep.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/87672939957.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/kenapage.pdf
    • https://cdn.shopify.com/s/files/1/0434/4256/9368/files/rozusijofeviselodu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1126/files/tunaxasoxili.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/todelesesuralu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4275/7029/files/gunedatumimub.pdf
    • https://cdn.shopify.com/s/files/1/0431/7121/7572/files/69458010669.pdf
    • https://cdn.shopify.com/s/files/1/0435/3448/3616/files/blueskysea_dv688_manual.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_off00006460.bin
259ea294f2a00e68f0f61a93dfffddf34f0d1e6433b8299865c89fb0044f373a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6460 5020 bytes
font_01_sfnt_off00007565.bin
5e0de50ba3f9c00c5cccfa666831da6bde16684a087cd975d007528029de376c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7565 10520 bytes