Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c404838a5a1471f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-18 20:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b6f518bd3caa4b903794d8e8f32f700 SHA-1: d6731a6a4e495625e3328a9afbf0a6a2dcd5004f SHA-256: 9c404838a5a1471fe7d820571ce026561393a39ec84f44b4557b423d7f5752c9
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic identifying it as a link farm. One of these links, 'https://ttraff.com/pify?keyword=haakaa+manual+breast+pump+review', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users to malicious infrastructure. The presence of multiple Shopify links, some benign and some pointing to potentially malicious content, further supports the link farm characteristic.

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=haakaa+manual+breast+pump+review
    • http://files.killjoy.info/uploads/1/3/1/3/131398605/xadaripivoz.pdf
    • http://files.wisconsinmomtribe.com/uploads/1/3/2/6/132695244/wixugejelekizoxul.pdf
    • https://cdn.shopify.com/s/files/1/0428/7817/3343/files/18472828558.pdf
    • https://cdn.shopify.com/s/files/1/0430/4352/0666/files/33248528297.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/33048378856.pdf
    • https://cdn.shopify.com/s/files/1/0440/6863/4789/files/video_karne_wala_vidmate_chahiye.pdf
    • https://cdn.shopify.com/s/files/1/0433/6274/6517/files/adinkra_symbols_and_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0439/2468/4955/files/78592497783.pdf
    • https://cdn.shopify.com/s/files/1/0434/9889/7574/files/juzoxuzowinuzapa.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/twitter_bootstrap_jumbotron_template.pdf
    • https://cdn.shopify.com/s/files/1/0436/0637/6611/files/how_to_hack_quizlet_live.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/2037255090.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064a4.bin
d8f6060e24fea667c3bff71609bb860ed97defbb627aafce4baee58f5730c35c
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A4 5284 bytes
font_01_sfnt_off0000768e.bin
10b8e4533888815fd64f0f39d1be550fd9177bfd57be0d43b60d242d4b0a0067
pdf-font-stream PDF embedded font (sfnt) at offset 0x768E 10076 bytes