Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc082be546a5083…

MALICIOUS

PDF

43.2 KB Created: 2020-08-15 14:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31b501abbc6a71987ee44b6d29ae7880 SHA-1: 51f6cba989a5f61ae760916ba302d9d4509a2f7a SHA-256: 2dc082be546a5083d764d3640292d7a8fe194de976b70b1ca4754dc3c2184383
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for 'logo design rules pdf'. The primary malicious URL identified is ttraff.com, which redirects to a page related to logo design. The presence of many Shopify links suggests an attempt to blend malicious content with seemingly benign resources.

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/wb?keyword=logo%20design%20rules%20pdf
    • http://files.nancysanimalwisdom.com/uploads/1/3/1/4/131453934/jebekuraledajom.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/wilitokaxudiso.pdf
    • https://cdn.shopify.com/s/files/1/0433/8388/1893/files/41398344147.pdf
    • https://cdn.shopify.com/s/files/1/0440/4055/2598/files/employee_offer_letter_format.pdf
    • https://cdn.shopify.com/s/files/1/0452/3291/4592/files/drug_antidotes.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/bupiva.pdf
    • https://cdn.shopify.com/s/files/1/0432/4016/1435/files/zavovikabogimomuwisopa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/free_ebook_reader_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0437/4819/6513/files/water_supply_and_pollution_control.pdf
    • https://cdn.shopify.com/s/files/1/0435/0679/4656/files/arm_basis_training.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30740110423.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5280/files/jisir.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/pastor_appreciation_speech.pdf
    • https://cdn.shopify.com/s/files/1/0439/0774/3899/files/statistical_inference_notes.pdf
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/valuvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/85078236959.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_off00006b81.bin
87864b67404647b4e34a8d44d02f9ecf93c4fba897eac6a156b997d103452692
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B81 4940 bytes
font_01_sfnt_off00007c66.bin
447de4524ad7dbb14350375591d08983f4745d67b05aeea9534bb626cc9ddbc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C66 10468 bytes