Malicious PDF — malware analysis report

Static analysis result for SHA-256 650ea8f457e108b4…

MALICIOUS

PDF

45.7 KB Created: 2020-08-31 09:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a24ac7667c6d2d2afe39cbcfb8f795cd SHA-1: db8255658fc975c385f3bf523ae9dafa0ecd3e5b SHA-256: 650ea8f457e108b4a781c65182615cff97682f0ba9f2bc2053cf588ee3d85434
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to enhancing video quality, which is a common tactic for phishing or malware distribution. It embeds a link to `ttraff.com`, identified as malicious redirector infrastructure. The document also features a large number of links to external PDFs, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the embedded malicious URL is the primary indicator of compromise.

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=video+kalitesini+y%25C3%25BCkseltme+program%25C4%25B1+full
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/8b4172_0bd321acde72433f83582ef244154b00.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d4ba40b1a6b4112bf25479cba565d0e.pdf
    • https://static.usrfiles.com/ugd/576447_fb4d6422736c4cfeb568ead2b3f069a2.pdf
    • https://static.usrfiles.com/ugd/b8c837_15391b1509634ac7be1bed88aeae6e23.pdf
    • https://static.usrfiles.com/ugd/6f9b04_355a408fbccd46f3b62573972b87d531.pdf
    • https://cdn.shopify.com/s/files/1/0435/0849/8591/files/43073654830.pdf
    • https://cdn.shopify.com/s/files/1/0435/3271/4135/files/series_and_parallel_circuits_workshe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9575/1842/files/62004300942.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/95202308220.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9489/files/recruitment_process_steps_template.pdf
    • https://static.usrfiles.com/ugd/e2f197_9febf7eb8259459ab38f10f2e9b76253.pdf
    • https://static.usrfiles.com/ugd/a01749_e62d396249b34eb8b8b8173b916ac948.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ac9f9b88e3c48abafbd446574e31abb.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_off0000693f.bin
250d7c7c2a7cfac70ff210e1fe371916e11fe491ddd23a914e30ed085c8d9397
pdf-font-stream PDF embedded font (sfnt) at offset 0x693F 5644 bytes
font_01_sfnt_off00007c37.bin
01b5fe3e323e3b6952ad0ec85ab4443f70edd75499787a6bd366dc510bbb9f59
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C37 14616 bytes