Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4fabb54942a19ed…

MALICIOUS

PDF

53.7 KB Created: 2020-08-15 18:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efb7ffc9bdf0095412cbc7c0003194f1 SHA-1: db75ea56701f24c6f052ae07f10566dcaf7ef08d SHA-256: d4fabb54942a19ed70813427b0da96471565235752db3db3090a05957522d7d0
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to Shopify-hosted PDFs, forming a link farm. The primary malicious link, 'https://ttraff.com/pify?keyword=fast+money+halftime+report+hosts', is identified as a known malicious redirector. The document body text, though partially corrupted, contains keywords related to 'fast money' and the malicious URL, reinforcing the lure. The ML classifier also strongly indicated maliciousness.

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=fast+money+halftime+report+hosts
    • http://files.ciannasilk.com/uploads/1/3/1/4/131438067/dafatupibovupab_tusunopusepanor.pdf
    • http://files.ethicaskincare.com/uploads/1/3/1/6/131637016/663b8f2.pdf
    • http://xapigeb.chefpops.ca/uploads/1/3/2/6/132695569/benavom_disogezawuno_pobojajo_sebelizaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/mowiganitaxozugivi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/kuwatijavigogizaxavamu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/naluzekofijatiroxutu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/joravefuligesabefirav.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/bu_bhopal_exam_form.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/dewebexuzaketajod.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/beekeeping_for_beginners_laurie_king.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0938/files/for_each_loops_java.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_off00009421.bin
15bd60d4087615bb204d99361cfd5f130d628bee3d105bf6ce4b65e853ddd7c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9421 5196 bytes
font_01_sfnt_off0000a5ac.bin
7f8164d2d607e7531d79059f598c4ece7e0238a4f89d856c791a460a9ae9649a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5AC 10632 bytes