Malicious PDF — malware analysis report

Static analysis result for SHA-256 04fb36033169683e…

MALICIOUS

PDF

49.3 KB Created: 2020-08-02 03:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbf04909345e40091dd4dd6acbe13cfc SHA-1: b33391c29cdd638410aa6240d8425303957a6099 SHA-256: 04fb36033169683e49697c075276f249bd9485b80ac4950c4f2bbc789fbd7585
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link disguised as a link to a Warren Buffett PDF, which is a common lure for phishing or scam campaigns. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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=the+warren+buffett+way+pdf
    • http://files.volunteercentermchenrycounty.org/uploads/1/3/0/7/130775998/nazebajubalorafewe.pdf
    • http://files.infinityfencingalliance.com/uploads/1/3/0/7/130738823/tizurigep.pdf
    • http://files.kingsfellowship.net/uploads/1/3/0/8/130874220/tegakalu-pejuditelaru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3810/6023/files/reddy_heater_parts.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5062/files/12633593580.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6510/files/zefuva.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/malabur.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/los_angeles_latitude_and_longitude.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0144/files/zasosuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/golakufajapafunokunizi.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/milakumegigugilujezuve.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0469/files/evermore_alyson_noel.pdf
    • https://cdn.shopify.com/s/files/1/0435/6082/9087/files/26892252936.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/3263936618.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/investment_science_luenberger_solutions.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_off00008380.bin
37a06341aac8f7620fe2bd25d5a04ed7b8b99f08069119faca068a34d2b4f68d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8380 5200 bytes
font_01_sfnt_off00009540.bin
26d8c35dd1c5cc8cabee155b9b4303ff1af1eaa50454c2038f0190347510571a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9540 10216 bytes