Malicious PDF — malware analysis report

Static analysis result for SHA-256 4816e5e2dd916b4b…

MALICIOUS

PDF

56.9 KB Created: 2020-08-09 03:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cb40113540f9667fbc216cd6cb48972 SHA-1: 0793595afe71bb132612090678917f5ab88ee2b9 SHA-256: 4816e5e2dd916b4ba1760fa66d14600053023a10cfcac5744107e5bb86ec171c
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it contains a link farm with numerous external PDF links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the primary purpose is to lure users through deceptive content and redirect them to malicious sites.

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=binge+eating+disorder+pdf
    • http://files.crmodelrepair.com/uploads/1/3/1/3/131379719/1294799.pdf
    • http://zepiw.simax.co.nz/uploads/1/3/0/9/130969723/dbff77b.pdf
    • http://tizito.thedivorcehorse.com/uploads/1/3/1/1/131163599/fa070d.pdf
    • http://files.arkansasbearcreekgoldensanddoodles.com/uploads/1/3/1/3/131381612/finawusime.pdf
    • http://files.sandraharveyphotography.com/uploads/1/3/1/3/131398406/1042773.pdf
    • https://cdn.shopify.com/s/files/1/0427/5362/2182/files/anatomical_terms_for_body_parts.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/6717227629.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/53711864196.pdf
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/47785283182.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/fixogotugove.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/kagavurabagewegasategu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/zajege.pdf
    • https://cdn.shopify.com/s/files/1/0431/2776/7206/files/23466698718.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1369/files/42828975513.pdf
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/98626416411.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/sebilatadot.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/wamedab.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_off00009ae7.bin
66a67d483ac00a8cc612237627c4d14ef768732a8d445c2a7875c5c39e65af9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE7 5224 bytes
font_01_sfnt_off0000acc5.bin
4e4f0f5d3d8649bfca2d69ccc53701166e561396f3e77aa3cb180120872f22fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACC5 12948 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.