Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6df31a638735c8…

MALICIOUS

PDF

71.0 KB Created: 2020-08-10 15:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee34e8fd85f2036edce72f0c5c744a2f SHA-1: 1dfa6dd8bc76380a6ddf938732db1182cb6b5be7 SHA-256: 4e6df31a638735c854f88d25980a2b5abeb25584390de1d62fa882febaf81456
152 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to a redirector service (ttraff.cc) identified as malicious. The document body, though heavily obfuscated, contains the malicious URL. This indicates a likely attempt to redirect users to a malicious site for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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=sabarimala+temple+history+pdf
    • http://files.sarahmurch.com/uploads/1/3/0/7/130775413/c338cf4f6536e83.pdf
    • http://files.cottlewolly.com.au/uploads/1/3/1/0/131070792/gidobiju_lazaguvavikuzeb_wenowolifuteri_wininutatefuzos.pdf
    • http://files.londahayden.com/uploads/1/3/1/6/131606056/gumixafa.pdf
    • http://naxanimo.mod-habitat.com/uploads/1/3/1/4/131453133/ruxijefaragot_noguvav_mikarufekegef_rasuti.pdf
    • http://wisem.menallenfriends.org/uploads/1/3/0/8/130874493/nanawu-fagutoxadufujon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/78978720726.pdf
    • https://cdn.shopify.com/s/files/1/0434/1648/6040/files/90739746534.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.pdf
    • https://cdn.shopify.com/s/files/1/0437/0097/7818/files/zudovisiwijusaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/juwogebiwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2611/files/gopimikinuliga.pdf
    • https://cdn.shopify.com/s/files/1/0440/1581/2766/files/lightweight_reader_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0434/9470/3270/files/colloquial_arabic_phrases.pdf
    • https://cdn.shopify.com/s/files/1/0434/0416/5276/files/being_a_godly_wife.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/77228304588.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/vokugalatugagofumeraj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3923/4967/files/tosev.pdf
    • https://cdn.shopify.com/s/files/1/0430/6052/7253/files/38602268629.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_off0000d8fb.bin
bc7c10509daa193a0a033f7a37687961b3799510533d39e84d20eec936c1c03b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FB 5624 bytes
font_01_sfnt_off0000ebf0.bin
06945a7e68646a0e31f400b9a005f94f844f5e5b2c9091e32ef5f0a55677892c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF0 10156 bytes

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