Malicious PDF — malware analysis report

Static analysis result for SHA-256 54bab54863c3581d…

MALICIOUS

PDF

55.1 KB Created: 2020-08-25 20:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f067e1ffb13062305887b91550ff27cb SHA-1: b4fe56cb16317816876e49ce62eab5af07d4b905 SHA-256: 54bab54863c3581df20b23f5e275d186b45722bbc1e75ff905ff2acf0e29fdf6
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. It also contains a link farm with numerous external PDF links, many hosted on Shopify. The primary malicious URL is https://ttraff.com/pify?keyword=no+game+no+life+riku, which is likely used to lure victims. The document body contains garbled text but includes the malicious URL and other embedded URLs.

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=no+game+no+life+riku
    • http://files.comfortexperts.net/uploads/1/3/1/8/131871740/3334170.pdf
    • http://files.movewithmeg.co.uk/uploads/1/3/2/6/132682976/c97b2163c9.pdf
    • https://cdn.shopify.com/s/files/1/0430/4538/8437/files/buwajogugomov.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2728/files/4415792891.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/4685539058.pdf
    • https://cdn.shopify.com/s/files/1/0440/5533/0966/files/kejovetamutidimavulapare.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/vikibozonorozu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/fipegavi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7847/5162/files/5518821935.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/guided_writing_linking_words.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3667/files/functional_anatomy_of_yoga_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/64744026852.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008134.bin
c64b7048754336667761ef3c3330cdac68325c34a55e1045299e3ab34d3795b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8134 4064 bytes
font_01_sfnt_off00008f69.bin
fbdd76a16be82df15d08b2ea53663ade3add6606507689ccae1f2c8d86a0e590
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F69 4940 bytes
font_02_sfnt_off0000a028.bin
6de26771161a5e9d96853108cc3996f0e7ac96c8de91955c494c49d7d069617a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA028 15224 bytes