Malicious PDF — malware analysis report

Static analysis result for SHA-256 2379001457745c57…

MALICIOUS

PDF

46.1 KB Created: 2020-08-17 07:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12da743c98abb8d2ddf124b8d65c0ae8 SHA-1: 32c88247f22427f3645afbc254682d1f60511a8e SHA-256: 2379001457745c572e0a1908a5076dba9d4f96327bc7956754a667dd7dab670a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged as malicious due to a high number of embedded links, many pointing to external PDFs. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=b+a+c+full+form'. The document body contains garbled text but includes the same redirector URL and several Shopify-hosted PDF links. The presence of numerous links suggests a link farm or redirection strategy, potentially leading 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.ru/pify?keyword=b+a+c+full+form
    • http://lebed.macarthurjrotc.com/uploads/1/3/0/9/130969483/litaxijiwipajegalutu.pdf
    • http://nevow.bieronskied.com/uploads/1/3/0/8/130873998/bawogewe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/lekipakorunogux.pdf
    • https://cdn.shopify.com/s/files/1/0432/5995/3312/files/islamic_baby_names_with_tamil_meaning_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4800/files/lekaxoviv.pdf
    • https://cdn.shopify.com/s/files/1/0428/0074/2567/files/dibisowa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/letaluzowowuwozexivuwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8395/files/33222953525.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/biztalk_server_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/fatuwefolonuwuwubosukuzem.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/real_life_discipleship_training_manual.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_off00007992.bin
6ff78e1f901ee9b01b0c9c0277c50aa5111114457652e95cfecfdca01e4ced81
pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 4900 bytes
font_01_sfnt_off00008a1b.bin
81431dc148678193b7e518e4a4e689c132c1d67163f4e8feda5de9a9ce72e56d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1B 9852 bytes