Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c166ad9d8cf0b1…

MALICIOUS

PDF

38.7 KB Created: 2020-08-28 00:40:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d9d2bd0f564b8a4f587c82d45f13a85 SHA-1: 7d9b44c86b2ec4c7f4f10eb3251d9b3c5bd18de7 SHA-256: c3c166ad9d8cf0b1b1bce84c516c02876fcd9408a162d0f313d9357604dd3706
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, a common technique for distributing malicious content or conducting phishing campaigns. One of the embedded URLs, https://ttraff.ru/pify?keyword=winnie+the+pooh+bees, is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO poisoning attempt to distribute 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=winnie+the+pooh+bees
    • http://files.fldancecenter.com/uploads/1/3/0/8/130813095/zesawupafepa.pdf
    • http://files.healingartsofthesouth.com/uploads/1/3/1/4/131483002/4836768.pdf
    • https://cdn.shopify.com/s/files/1/0428/7207/8499/files/90578350539.pdf
    • https://cdn.shopify.com/s/files/1/0434/1153/8072/files/96_seadoo_xp.pdf
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/pawoliduxusuba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52244446143.pdf
    • https://cdn.shopify.com/s/files/1/0440/1093/0341/files/backdrop_banner_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5721/files/ralekekiginexudunabirone.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/juleteporube.pdf
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/the_lego_architect.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/40420464278.pdf
    • https://cdn.shopify.com/s/files/1/0447/9988/5463/files/christian_baby_names_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0429/0671/4268/files/games_for_windows_live_download.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_off00005d32.bin
393df17b0ae48d65635ee1a4ea3b3ad34470339546221b6f6e777e6d8b010c37
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D32 4724 bytes
font_01_sfnt_off00006d43.bin
d47023356e072f81a19fe4eff2d602389c11de3fe4a58e1f8d9da8bfc3057fd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D43 9744 bytes