Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dca33babaa24191…

MALICIOUS

PDF

46.1 KB Created: 2020-08-25 06:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39b2a8e1b1597bab2f9dd9212e22d485 SHA-1: 77f4de02cc279b0218e5c29c4ed3c6db24da7508 SHA-256: 8dca33babaa241911f442d570e08eb8c2e8387d8579c653bec4b66909f23195a
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic firing for a malicious redirector link. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=cory+catfish+care+guide', which likely serves as a redirector to further malicious content. The document body contains garbled text, suggesting it is not intended for human consumption but rather as a vehicle for the embedded links.

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/pify?keyword=cory+catfish+care+guide
    • http://basik.miaouofficials.com/uploads/1/3/2/8/132814930/solukuzut-lireve-nomeposexejep-jizegugidev.pdf
    • http://files.rebeccakallies.com/uploads/1/3/1/3/131380728/8174588.pdf
    • http://luzemov.spiritrec.com/uploads/1/3/1/6/131637309/xowomido.pdf
    • http://files.whipplecreekadventurers.com/uploads/1/3/2/6/132695755/kafiga_xuxodapetapuji.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/nukabagoluvuginejere.pdf
    • https://cdn.shopify.com/s/files/1/0433/4311/8495/files/25489767726.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2916/files/vidizupusi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mipin.pdf
    • https://cdn.shopify.com/s/files/1/0429/2529/3724/files/tazuken.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tipibag.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/kedekubose.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84860081798.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/ralifite.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/bearing_design_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/1329/8581/files/94470424688.pdf
    • https://cdn.shopify.com/s/files/1/0440/6896/2469/files/barcelona_transit_map.pdf
    • https://cdn.shopify.com/s/files/1/0436/5923/1385/files/woperobabikul.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/75163671279.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_off0000775a.bin
3c31de1749183afd2cb99ef540a28ae9d04b6c56e8f59ada5623042a51a710bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x775A 5260 bytes
font_01_sfnt_off00008934.bin
ca9ab33d331fff95bb36488a5b4cff5abc40e15985889828d1972aaad03f5ec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8934 10004 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.