Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80253c2d65008d0…

MALICIOUS

PDF

44.3 KB Created: 2020-08-15 07:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d43104a6378886a4d815138820a8e2e8 SHA-1: a9fa2f6cc04366ddcb784f761b87de5d3e834136 SHA-256: b80253c2d65008d058d1eaff7bafa619ef806db34621ff6a9b9fa34ea59b0efb
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text and numerous embedded links suggest a lure for free movie downloads, which is a common tactic for distributing malware or leading users to phishing sites. 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=amelia+full+movie+free
    • http://files.parakeetpro.com/uploads/1/3/1/3/131398498/a7a17aecd76.pdf
    • http://kamuki.docsjoininghands.com/uploads/1/3/1/3/131383548/7ec4c7.pdf
    • http://files.warriorsofpurpose.org/uploads/1/3/1/6/131607029/nakidijekidul.pdf
    • http://files.anotsoemptynest.com/uploads/1/3/2/6/132695388/zotujututopoker.pdf
    • http://kapenuw.noamattias.com/uploads/1/3/1/4/131452976/d01cab9ffb4536d.pdf
    • https://cdn.shopify.com/s/files/1/0432/9357/3284/files/topixomi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/69841487937.pdf
    • https://cdn.shopify.com/s/files/1/0433/5996/1237/files/4298423747.pdf
    • https://cdn.shopify.com/s/files/1/0431/6109/2255/files/sufazefuxinorisavebavize.pdf
    • https://cdn.shopify.com/s/files/1/0439/3412/2139/files/7328800891.pdf
    • https://cdn.shopify.com/s/files/1/0440/8243/0117/files/79663197653.pdf
    • https://cdn.shopify.com/s/files/1/0439/2307/9323/files/noxagifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3437/files/rokanuxefokapelodegipa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/18589637393.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0358/files/vujituximipik.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7717/files/12080785612.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/35862616251.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_off000070f5.bin
6895aba8400520307462bfaa201e783e91289f277b3963e7f6b0d6f94b379bab
pdf-font-stream PDF embedded font (sfnt) at offset 0x70F5 4784 bytes
font_01_sfnt_off0000812d.bin
435230d4ddeb7e8682f721cf73520fdf96f4f33eb2ed63f16c7039a5344a3227
pdf-font-stream PDF embedded font (sfnt) at offset 0x812D 10364 bytes