Malicious PDF — malware analysis report

Static analysis result for SHA-256 c267d59d553e6aee…

MALICIOUS

PDF

42.3 KB Created: 2020-08-29 18:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29b6a9e816c1f7739a6e4b3f59a9068c SHA-1: dc1c81ae0ccd2a7777d7dc5e6d268caa7e462312 SHA-256: c267d59d553e6aeec5f3a0685aba9dd0f9a2a48dd12be2a3447cf8e5065f608f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs. The primary malicious link, https://ttraff.com/wix?keyword=persuasive+speech+outline+template+word, is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to a 'persuasive speech outline template', suggesting a social engineering lure to entice users to click the malicious link. 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/wix?keyword=persuasive+speech+outline+template+word
    • https://cdn.shopify.com/s/files/1/0434/1841/9349/files/17887264220.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/50035582066.pdf
    • https://cdn.shopify.com/s/files/1/0434/0305/1171/files/zosazadorokutojaru.pdf
    • https://cdn.shopify.com/s/files/1/0433/3853/0965/files/zinel.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/likiri.pdf
    • https://cdn.shopify.com/s/files/1/0434/8094/0709/files/10896184150.pdf
    • https://cdn.shopify.com/s/files/1/0439/8029/2254/files/zaytoven_drum_kit_free.pdf
    • https://static.usrfiles.com/ugd/824332_5902b0d6d3434182ab0c6b1163e4b8c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_838b1f6d921a45f588b90eeb6c1afaef.pdf
    • https://static.usrfiles.com/ugd/b8c837_fb0b068f3bd44d729797f132ed3b1342.pdf
    • https://cdn.shopify.com/s/files/1/0438/2726/5693/files/gojeziniti.pdf
    • https://cdn.shopify.com/s/files/1/0430/8625/0137/files/bunodebazezix.pdf
    • https://cdn.shopify.com/s/files/1/0431/1334/9273/files/cooling_tower_components.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_off00006767.bin
08821f85ef76e62e2f8736ade4b7b72a6ab2926abe77325f6fdd7544e0ce3a0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6767 5464 bytes
font_01_sfnt_off000079dd.bin
5377405b914ca276a775e4d9b23fc70bfa0dab589643509a76826bfaccbb2e82
pdf-font-stream PDF embedded font (sfnt) at offset 0x79DD 10080 bytes