Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0b38a68f26f418…

MALICIOUS

PDF

51.4 KB Created: 2020-08-06 21:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31ac7ce60bdd893006fffdfad7a4aadb SHA-1: bf330f494057007fb5832a8cc44405d30c87b4b5 SHA-256: ba0b38a68f26f418dc57a96e467e9d274c74f682610537830c5befbe6ff41bab
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=klasifikasi+bayam+merah+pdf'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external PDF links, with the first being 'https://cdn.shopify.com/s/files/1/0431/2258/9853/files/giretawazimukafokoxap.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting a lure to a malicious site.

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=klasifikasi+bayam+merah+pdf
    • http://files.walmerchapel.org/uploads/1/3/1/6/131606739/4591327.pdf
    • http://files.civilkingaustralia.com.au/uploads/1/3/0/8/130813898/90d4276.pdf
    • http://files.evabogdan.ca/uploads/1/3/1/1/131164260/7331543.pdf
    • http://files.countrysideanimalclinictooele.com/uploads/1/3/1/3/131380868/newufutuje.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/giretawazimukafokoxap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30347825404.pdf
    • https://cdn.shopify.com/s/files/1/0432/3521/3467/files/tokikusezexisefekomiweb.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/seworaletig.pdf
    • https://cdn.shopify.com/s/files/1/0431/6141/9927/files/tosefulij.pdf
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/miposemirisakebufolit.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/3.pdf
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/duvupakofunuzumozod.pdf
    • https://cdn.shopify.com/s/files/1/0431/1118/6588/files/16130995686.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8152/files/bimugoxeniwitevu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/79122535450.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/make_friends_and_influence_others.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34292265756.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/busakusixomepumedeforilaj.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_off00008706.bin
3cc18796ae1e3ba6fcdcd49fd1559b4dcbfd9f3e33e4a0935979d3f0a6c93bbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8706 5556 bytes
font_01_sfnt_off000099c3.bin
a6541809a277262976a2f4abb70ad9cd0dbb6801adf526d68db36f7c48f9a61f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99C3 12220 bytes

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