Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f8a50fe6c8af8f…

MALICIOUS

PDF

117.4 KB Created: 2020-07-31 05:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3393d8144e4054e3c95b9852823643d4 SHA-1: f00fe281497866494bbaaee096ce18bed2db4de9 SHA-256: 80f8a50fe6c8af8fd234eb0211dd81d54308ed2180027918b5ecdecd49de1c03
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large external link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, particularly the one pointing to 'ttraff.cc', are likely part of a redirection chain designed to lead users to malicious content. The document body appears to be malformed or obfuscated, providing no clear textual lure.

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=boule+de+suif+maupassant+pdf
    • http://files.thesummitplayhouse.org/uploads/1/3/0/7/130739140/mekuvizon.pdf
    • http://files.blackserpentpress.com/uploads/1/3/0/7/130775866/27f8c.pdf
    • http://files.advindmktg.com/uploads/1/3/0/7/130739239/tifadu.pdf
    • http://files.wbmconference.net/uploads/1/3/2/8/132814933/4425469.pdf
    • https://cdn.shopify.com/s/files/1/0427/9818/6652/files/43957075257.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30408896218.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/fowij.pdf
    • https://cdn.shopify.com/s/files/1/0432/7617/3472/files/14575380683.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/29549009975.pdf
    • https://cdn.shopify.com/s/files/1/0434/3493/4429/files/wegijusip.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/temafutipapakopigalazase.pdf
    • https://cdn.shopify.com/s/files/1/0433/7981/8661/files/42288754315.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/burozesurolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/roletawogosupag.pdf
    • https://cdn.shopify.com/s/files/1/0433/4262/6984/files/dojuzepesinewe.pdf
    • https://cdn.shopify.com/s/files/1/0434/9411/3446/files/medojipodabi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/mumupisaseruvisuwa.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_off00018ee8.bin
7c11c1a43ae9371e123cd83845c9da6540adc309a301dfdf350a767b6f793f63
pdf-font-stream PDF embedded font (sfnt) at offset 0x18EE8 5024 bytes
font_01_sfnt_off00019fea.bin
2d61911224a752380882fc0b88d2f27ac7d404544b410af6d816ce507473ffed
pdf-font-stream PDF embedded font (sfnt) at offset 0x19FEA 12380 bytes