Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc8bbc5e0f13ac8…

MALICIOUS

PDF

45.1 KB Created: 2020-08-29 11:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce7f3b24b3f2b80c71f744d9dbd40757 SHA-1: 7fc3ddd3d4eff7cbf4d517c180a05e760fbff1c9 SHA-256: 4bc8bbc5e0f13ac89ca5f8d6089998eda91cd0e8ab75a8847d8409055de5a3c0
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, primarily pointing to PDF files hosted on Shopify. One of these links, 'https://ttraff.cc/wix?keyword=lost+boys+wine+bottle', is identified as a malicious redirector. This suggests a phishing or malicious content distribution scheme, likely aiming to lure users to malicious sites through a link farm.

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/wix?keyword=lost+boys+wine+bottle
    • https://cdn.shopify.com/s/files/1/0454/2903/1070/files/44963973157.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/beyond_diet.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/bumajanokibifujazibazere.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/kadodezonagogamilavadobi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7618/8315/files/vidmate_free_apk_ios.pdf
    • https://static.usrfiles.com/ugd/b8c837_822f31ee723b42e396225a7d915ab1c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ad8430f36ad4a33a843615bf3a0bdac.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa573429fb52486d9ceffad07794d9fb.pdf
    • https://cdn.shopify.com/s/files/1/0428/0372/4455/files/98311712364.pdf
    • https://cdn.shopify.com/s/files/1/0440/5926/3141/files/35402121855.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/legitanafaxevafagum.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/plus_size_bra_measuring_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/0145/4496/files/simple_budget_proposal_sample.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_off00005e49.bin
e32d0d3bddf867b8639f705d9be024021dd29f2b6a4f7b9eef9801c06405f370
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E49 4648 bytes
font_01_sfnt_off00006e48.bin
f6c7e14b688821211a0ecd0d431ff8ffbd2481e3fe91e176ab41af7e000f071d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E48 10460 bytes
font_02_sfnt_off000091f2.bin
028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b
pdf-font-stream PDF embedded font (sfnt) at offset 0x91F2 16312 bytes