Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2dabba2d037eef…

MALICIOUS

PDF

42.0 KB Created: 2020-09-01 21:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f04c27f0739dd1e1ea82a76ea184b05b SHA-1: 1dc28db65b79be6911d9c7b0e94e5c545df6263a SHA-256: cc2dabba2d037eefb58a3c16bf7cd8f0f4c7a29d7309364d278af0208c2dda92
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, https://ttraff.com/wix?keyword=is+poker+a+form+of+gambling, points to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain text related to the URL's keyword, suggesting a lure. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=is+poker+a+form+of+gambling
    • https://cdn.shopify.com/s/files/1/0434/4954/8966/files/the_feminism_and_visual_culture_reader.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/canon_in_d_classical_guitar_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xedatojif.pdf
    • https://cdn.shopify.com/s/files/1/0436/4586/2041/files/argentina_world_cup_squad_2018_formation.pdf
    • https://cdn.shopify.com/s/files/1/0470/9056/5278/files/inline_speed_skates_buying_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/1607588214.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/51068080690.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/sunimu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/26780068773.pdf
    • https://cdn.shopify.com/s/files/1/0433/9820/1502/files/muduwofonagujanobar.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/fazubabutapivufuberuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/35416774371.pdf
    • https://cdn.shopify.com/s/files/1/0428/9085/4566/files/89977170470.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/36210806482.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_off0000670f.bin
a0c56ab8364ac3638a6c829d2b3fbc8e96426408057074bd25a4e5c7895d9b0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x670F 5364 bytes
font_01_sfnt_off00007938.bin
59745150e84bf69a500ea5eeb5fe2b28cdf8c54476156369f6b8c456a8178929
pdf-font-stream PDF embedded font (sfnt) at offset 0x7938 9960 bytes