Malicious PDF — malware analysis report

Static analysis result for SHA-256 a046fd2c13bd2375…

MALICIOUS

PDF

41.0 KB Created: 2020-08-09 06:46:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce572e7c9abe3c171c3942796c06aa92 SHA-1: 3596bc1d8529aa150a8599342b8035f2ab9043f8 SHA-256: a046fd2c13bd23751610c54dbeaa89011c5696a70bd378fd344a6e56e5b16930
152 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous embedded URLs, many pointing to Shopify domains, but one critical URL redirects to a known malicious site. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and contains the primary malicious URL, suggesting a lure to a phishing or malware distribution site.

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.ru/pify?keyword=agriculture+in+africa+pdf
    • http://files.angelbluemarketing.com/uploads/1/3/1/4/131408970/59028f8fd16c.pdf
    • http://files.maranathabiblens.com/uploads/1/3/1/3/131380342/bopadow.pdf
    • http://files.befreecounselling.com/uploads/1/3/1/1/131164456/pigaxezu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2217/0786/files/30319696455.pdf
    • https://cdn.shopify.com/s/files/1/0437/8342/2109/files/cocktails_recipes_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3873/files/58511588681.pdf
    • https://cdn.shopify.com/s/files/1/0429/7143/1065/files/35193392354.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/dizapirivopajiz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/47595948190.pdf
    • https://cdn.shopify.com/s/files/1/0435/4313/4362/files/agriculture_in_tamilnadu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8338/2427/files/67082682352.pdf
    • https://cdn.shopify.com/s/files/1/0433/8932/1366/files/concepts_in_thermal_physics_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/joxediri.pdf
    • https://cdn.shopify.com/s/files/1/0431/5738/9472/files/66914377309.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/nedisasudike.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/rojaripovoronamiwirirunup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/rakipolititajuneratoraj.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_off000062be.bin
be81bb658922cf7afb2f2596015ad659df3d28b9e929b31507a1c354571da21a
pdf-font-stream PDF embedded font (sfnt) at offset 0x62BE 5136 bytes
font_01_sfnt_off0000744f.bin
b01935f97ac14a1d407a15829a83add995ac336638f0c8da4808911e624d3c96
pdf-font-stream PDF embedded font (sfnt) at offset 0x744F 10268 bytes