Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb0dd6652dbba605…

MALICIOUS

PDF

45.2 KB Created: 2020-08-24 01:47:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 137319cd5afc081b93379a0366d87f15 SHA-1: 14333e1c8ac9416dd2c1152310b0fd98d1a9594d SHA-256: bb0dd6652dbba60576950670f1a27f664fa718a4572ee6644acdb2ecee8f110c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=sheet+metal+press+deep+drawing'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to a potentially harmful site.

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=sheet+metal+press+deep+drawing
    • http://files.neciasnotables.com/uploads/1/3/0/8/130874422/c5d695.pdf
    • http://xades.livingsilverspring.com/uploads/1/3/1/6/131606162/459f26e1191e19.pdf
    • http://lituziju.cchoneybrook.org/uploads/1/3/1/4/131437549/8786559.pdf
    • https://cdn.shopify.com/s/files/1/0429/6710/5687/files/10237302309.pdf
    • https://cdn.shopify.com/s/files/1/0430/4666/6389/files/administration_duties_and_responsibilities.pdf
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/35014001886.pdf
    • https://cdn.shopify.com/s/files/1/0448/3714/2690/files/terrorbyte_gta_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/wejabinubedokijipave.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/tagalog_to_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0436/1895/9523/files/gekaguwumib.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4865/files/husqvarna_yth24v48_parts.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/gipaneketuzirizere.pdf
    • https://cdn.shopify.com/s/files/1/0437/7565/6097/files/algebra_2_practice_workbook_answer_key.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_off0000729e.bin
ff3983cc14dc1695bb175868cbd5606b3256d323d9ca5811f64c66b4a4aff39d
pdf-font-stream PDF embedded font (sfnt) at offset 0x729E 5568 bytes
font_01_sfnt_off00008572.bin
2f07c5afe5e9add06fe9d69d57ebd50a75c4de808d4bff0ceb3a431366e210a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8572 10208 bytes