Malicious PDF — malware analysis report

Static analysis result for SHA-256 55698e6909f05a2b…

MALICIOUS

PDF

41.3 KB Created: 2020-08-14 23:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4d4f5f0fb4065e2b038f28bc165187e SHA-1: 49c1426173eb55ac84707e2a87c8fa453c337a5f SHA-256: 55698e6909f05a2b33eac493526354adc6ed96b8a5c350f8e308ef0c661b2e11
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a redirector to a malicious URL, suggesting a link farm or phishing attempt. The document body text, though partially corrupted, contains the phrase 'Franchise agreement termination template' and the malicious URL, indicating a lure to entice users to click on the malicious link. The presence of numerous Shopify-hosted PDF links, some marked as benign and others unknown, suggests a tactic to blend malicious content with legitimate-looking 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.cc/pify?keyword=franchise+agreement+termination+template
    • http://files.utahfccla.org/uploads/1/3/0/8/130813511/nawokeso-bajetabab-nepetoweboz-wabup.pdf
    • http://files.evansalumni.net/uploads/1/3/1/8/131872104/tebivofobizi_xodasab_nojolap.pdf
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/5343839194.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/fegopisalikadol.pdf
    • https://cdn.shopify.com/s/files/1/0434/1914/0253/files/17747054500.pdf
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/66263077956.pdf
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/14416453801.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/tiruz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/59909741883.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/1st_world_war_causes.pdf
    • https://cdn.shopify.com/s/files/1/0438/8965/5960/files/togevesaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/8257/9110/files/69184738252.pdf
    • https://cdn.shopify.com/s/files/1/0437/8486/3893/files/35209150819.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_off000063e7.bin
6b35dcddd36e68c830df053a6ceba0c3656515cde9c6f917a983aa6a559ec3ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x63E7 5300 bytes
font_01_sfnt_off000075be.bin
aee519d0777eb674657078328afe4cca90c45eb2baa73ce8aad707b27670bd13
pdf-font-stream PDF embedded font (sfnt) at offset 0x75BE 10128 bytes