Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a93fcf2465bc32…

MALICIOUS

PDF

34.0 KB Created: 2020-08-23 06:03:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e231b1688632145fecdfdc40db8e97b SHA-1: 318ced92152bf4782959717158bf95d35f3b3caf SHA-256: 70a93fcf2465bc327139fc19b686d74861bc9264a292e5ba5aa6d86484bce6f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=sql+server+2016+sp1++iso', which is flagged as malicious. The presence of many external PDF links, some benign and some unknown, indicates a link farm or redirection strategy. No scripts were extracted from this sample.

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/pify?keyword=sql+server+2016+sp1++iso
    • http://files.jeffersonchoralsociety.org/uploads/1/3/1/4/131453715/davuxis.pdf
    • http://files.enactyourfuture.com/uploads/1/3/2/6/132681460/4547535.pdf
    • http://files.uhuconservancy.com/uploads/1/3/2/7/132712282/3316066.pdf
    • http://files.wellness.org.sg/uploads/1/3/1/4/131437249/7598015.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0461/7057/0915/files/canon_pixma_ip100_driver_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5473/4241/files/ryobi_mitre_saw.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/public_policy_making_in_nigeria.pdf
    • https://cdn.shopify.com/s/files/1/0438/5370/9472/files/gravity_form_css.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/28397911339.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9635/files/akutagawa_short_stories.pdf
    • https://cdn.shopify.com/s/files/1/0437/6556/3549/files/57504858202.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/zevab.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3130/files/wukefuvijisudaboziluwukil.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004825.bin
6587f4e856de8b59d26a0608af11b95704b5765e9304c2d15e5548eebf7a2338
pdf-font-stream PDF embedded font (sfnt) at offset 0x4825 5372 bytes
font_01_sfnt_off00005a8c.bin
08f55fafed2a510cd74b2ca157c7edc930899a0e63e16d0627c1d57b683e2b62
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8C 9648 bytes