Malicious PDF — malware analysis report

Static analysis result for SHA-256 28ccbda6a6729b5d…

MALICIOUS

PDF

37.6 KB Created: 2020-08-26 13:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 003f461fa23e12ba041ad9cc526111dd SHA-1: 27d40fa58ddb07aae899eacd83dc607f241f4def SHA-256: 28ccbda6a6729b5db307b19fd470deb67cf6742a42a6fe24c55d57079a9712b8
150 Risk Score

Malware Insights

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

The PDF document contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=divinity+2+fire+slugs'. Additionally, it exhibits a PDF link farm behavior with 18 external links, many hosted on Shopify, suggesting a potential SEO manipulation or a lure for users. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=divinity+2+fire+slugs
    • http://netetem.friendsofmaduraiseed.org/uploads/1/3/1/4/131407406/5287505.pdf
    • http://momenaniw.galerieboisbrule.com/uploads/1/3/0/7/130776021/fuwefadarazu_surixerezeniko_lowanokuku.pdf
    • http://files.worldiqchallenge.com/uploads/1/3/1/3/131382092/telibunepabo-nizotimepe-kivinuse.pdf
    • http://nexovo.gmcceuref.co.uk/uploads/1/3/0/8/130814172/de264a.pdf
    • http://files.lumisworks.com/uploads/1/3/0/7/130775265/ropokoresibefijo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7712/4764/files/esl_beginner_vocabulary_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0440/4084/7510/files/master_exploder_chords_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/1264/3227/files/chronological_report_sample.pdf
    • https://cdn.shopify.com/s/files/1/0434/2431/7607/files/76906108432.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2045/files/hp_elite_book_8560p_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7903/files/errata_sheet_samples.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/zajurikufopilejo.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3510/files/wazixuvade.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/jugezidapanemuzeninodibur.pdf
    • https://cdn.shopify.com/s/files/1/0459/8779/1015/files/60570854683.pdf
    • https://cdn.shopify.com/s/files/1/0428/5038/6079/files/chennai_express_full_movie_online.pdf
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/60173287752.pdf
    • https://cdn.shopify.com/s/files/1/0434/4043/9446/files/21199717790.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/
    • https://cdn.shopify.com/s/files/1/0434/4043/9446/files/21199

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055c1.bin
2c0aacba1aa48ba511e262802ec7d781174f42719686566a7517c4640262ea6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x55C1 5020 bytes
font_01_sfnt_off00006700.bin
2190fa58f41309d42f6a848f45931f4a7fdde03afb0777d420e6d04c34b0c8e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6700 10208 bytes