Malicious PDF — malware analysis report

Static analysis result for SHA-256 029e82ea7689c458…

MALICIOUS

PDF

46.4 KB Created: 2020-07-28 17:16:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b20589aae0c72c62d55a8f8273c8aaa5 SHA-1: 909ec88f9dbd4aefbb81246a3e16c6b40b7f4e9c SHA-256: 029e82ea7689c4586cc1f4635a781d2a7664bc2dcacf23c4ded6e238a7b59c53
154 Risk Score

Malware Insights

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

The PDF file contains numerous links designed to redirect users to external websites, including a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'Android games', likely intended to deceive users into clicking malicious links. The ML classifier strongly indicated maliciousness, and the presence of a redirector URL supports a phishing or scam attack pattern.

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=android+2.+3.+5+games++for+mobile
    • http://files.gaggiamanualservice.com/uploads/1/3/1/6/131606546/wanelurene.pdf
    • http://files.forumarmstrade.org/uploads/1/3/0/8/130873810/ca793900d2ed3.pdf
    • http://files.drbryanmills.com/uploads/1/3/0/7/130775504/d4f5e48b28e3c.pdf
    • http://files.norcalpermitservice.com/uploads/1/3/0/7/130775431/pimebukuw-remudix-sofozexo-pokixumegen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/4062/8136/files/vopovipawubewafededurugix.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/derijuwosajapomefi.pdf
    • https://cdn.shopify.com/s/files/1/0438/0740/8290/files/xawezakomobomawijano.pdf
    • https://cdn.shopify.com/s/files/1/0437/2843/7409/files/1942334069.pdf
    • https://cdn.shopify.com/s/files/1/0434/8107/1782/files/ginugetilusilefezawifo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1146/5638/files/26812267000.pdf
    • https://cdn.shopify.com/s/files/1/0434/4781/2248/files/96245600302.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/86022658871.pdf
    • https://cdn.shopify.com/s/files/1/0432/9740/7126/files/9943971267.pdf
    • https://cdn.shopify.com/s/files/1/0430/2379/4337/files/1126133999.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_off000077c4.bin
e8901cb12a19ae076e26934e3f7cdf987156da12e9d7fdc7a30522d491151003
pdf-font-stream PDF embedded font (sfnt) at offset 0x77C4 5516 bytes
font_01_sfnt_off00008a61.bin
bf63495b822c2a071aa5a5e2e1f0fb4d3aaecbc8f33511ecc79dadc42b8cac48
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A61 9952 bytes