Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c07fc338942463e…

MALICIOUS

PDF

38.2 KB Created: 2020-08-15 00:09:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 208518435988f54ddd6363ab2c6cf16c SHA-1: fcff65b71c679a8794ab9cec062ae54b40c26a01 SHA-256: 9c07fc338942463eba5f8a7a90bd75ce07f4fdc13098027368bd5fd13e90edd8
154 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 leads to a known malicious redirector. This suggests a social engineering tactic to drive traffic to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, reinforcing the assessment of a malicious redirector attempt.

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=calcium+hypochlorite+msds+pdf
    • http://fogef.fischerandcardamone.com/uploads/1/3/2/8/132814930/873131e7e7fce.pdf
    • http://files.supergreenteam.org/uploads/1/3/2/8/132814589/4755894.pdf
    • http://rixuvezej.circuitocampoatravesdipgra.com/uploads/1/3/2/3/132302815/b248e58d1b885af.pdf
    • http://files.hooverphotopoet.com/uploads/1/3/1/4/131406811/4ec03.pdf
    • https://cdn.shopify.com/s/files/1/0434/3965/3030/files/cancer_de_colon_peru.pdf
    • https://cdn.shopify.com/s/files/1/0436/8692/0347/files/maximo_asset_management_7._6.pdf
    • https://cdn.shopify.com/s/files/1/0429/2047/6828/files/zupodijalidud.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/16732254907.pdf
    • https://cdn.shopify.com/s/files/1/0433/1982/0446/files/timemarisefogimatolofikog.pdf
    • https://cdn.shopify.com/s/files/1/0433/4387/2153/files/basic_computer_skills_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4563/2665/files/master_lock_serial_number_crack.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/rosofo.pdf
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/the_pirate_bay_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1028728638.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fatexuxutul.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_off00004f93.bin
4d59d8978b89b5f2c841930603f38c029e32daff590841768b50439b79d90ef5
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F93 5404 bytes
font_01_sfnt_off000061d5.bin
40b03d696b1487f90dca7edc9ab353e932274bfc4843a85da0cea12fcfe60e30
pdf-font-stream PDF embedded font (sfnt) at offset 0x61D5 13600 bytes