Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a01d5fdc3abca83…

MALICIOUS

PDF

39.5 KB Created: 2020-08-19 13:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e249c4b9c4aed9f11ac50756526ad30f SHA-1: 7702eb133421cc13e2e0f036ab8cc52337724158 SHA-256: 2a01d5fdc3abca838fc88f29a3e0f374e21e5073053f24c98a3c04e69dc30170
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous other links, many hosted on Shopify, indicates a link farm strategy. The ML classifier strongly supports the malicious nature of this PDF.

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=boot+camp+workout+videos
    • http://files.c3churchburwood.org/uploads/1/3/1/1/131164129/legekuwobosiku.pdf
    • http://files.lookingforalyssa.com/uploads/1/3/2/6/132695734/padojidosedofezafira.pdf
    • https://cdn.shopify.com/s/files/1/0427/8085/2383/files/where_to_put_autoexec_cs_go.pdf
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/lisedetiposuvovewipif.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/79271373578.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/nurag.pdf
    • https://cdn.shopify.com/s/files/1/0434/2949/4933/files/58103070714.pdf
    • https://cdn.shopify.com/s/files/1/0439/7786/7422/files/11301826798.pdf
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/blockchain_technology_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0427/5663/6828/files/mepelebofebuvakemutugojaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/calculus_vol_1_tom_apostol.pdf
    • https://cdn.shopify.com/s/files/1/0438/2231/7728/files/dbprotect_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/resize_mac_a3_to_a4.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/kujeborojunokobirax.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_off00005d8f.bin
b9c0a8a82d7b3f41f1eb7da95f980ca73bb3c563f104dbc41b5b32a41648793f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8F 5452 bytes
font_01_sfnt_off00007015.bin
12c46c45698e9870896fd32e466fbcac15beffd3e1fe8456761d2642176cfb80
pdf-font-stream PDF embedded font (sfnt) at offset 0x7015 9764 bytes