Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc63e54086eb440…

MALICIOUS

PDF

39.5 KB Created: 2020-09-06 04:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0d05a7df249ea5c1b03a16b3a7d182a SHA-1: 866ba684b5351e8ecdb6f8447564bc2c00824279 SHA-256: bfc63e54086eb440f971516c01c891ed82d072f5923fbf0d01a652f41ca173b3
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a critical heuristic due to its inclusion of a link to a known malicious redirector. Additionally, it contains a large number of external links, many pointing to Shopify-hosted PDFs, characteristic of an SEO link farm. The primary malicious IOC is the ttraff.link URL, which likely serves as a gateway to further malicious content.

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.link/wix?keyword=bar+crowd+cheering+meme+template
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/computer_vision_in_matlab.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/muscle_gain_workout_plan_at_home.pdf
    • https://cdn.shopify.com/s/files/1/0440/9724/1240/files/wafiwozizisinisawuzutofor.pdf
    • https://cdn.shopify.com/s/files/1/0446/6514/3449/files/zubatikulozozis.pdf
    • https://cdn.shopify.com/s/files/1/0432/5471/0427/files/jalotadopejolitaw.pdf
    • https://static.usrfiles.com/ugd/b8c837_c3a0684e3e0f4a4e8832b2a17d4eba19.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9781/files/ashraful_hidaya_part_2.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/pisubidofisom.pdf
    • https://cdn.shopify.com/s/files/1/0440/2262/8502/files/83419212318.pdf
    • https://cdn.shopify.com/s/files/1/0440/6929/0149/files/15251374046.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/27970288792.pdf
    • https://cdn.shopify.com/s/files/1/0463/7677/9931/files/makarexuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/4091/3046/files/dopis.pdf
    • https://cdn.shopify.com/s/files/1/0440/5454/4534/files/32020272994.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_off00005bbe.bin
84df8f6d13d78c97e37fd9a2c467b7dcc1decb53e5f5d3e38b4af5ef61d00cfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBE 5452 bytes
font_01_sfnt_off00006e2f.bin
a3faf9c5f3c0a8db97439af13eb23788efdb439cc832aa53dfae155eaf5344c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2F 10304 bytes