Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc5bf7a1bfd30a5…

MALICIOUS

PDF

51.8 KB Created: 2020-07-31 17:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cace60e607d26c67563efe1c03d8142c SHA-1: 67b7f91fcd9dc9ab27d7cd32d80f1387390a3f37 SHA-256: ccc5bf7a1bfd30a5b55e785605776f471034248ff95ce387ab97347cc1382de2
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as a Massey Ferguson tractor manual download. The PDF also contains a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic to improve search engine ranking for malicious content. The ML classifier strongly indicated maliciousness.

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=massey+ferguson+240+operator%2527+s+manual+download
    • http://files.calibeekids.com/uploads/1/3/0/7/130775902/e236a39542d3a.pdf
    • http://files.toyszoneshiloh.com/uploads/1/3/1/6/131637631/9057773.pdf
    • http://files.sociedadlucasrd.org/uploads/1/3/0/8/130813747/c533dbb7ee9375.pdf
    • http://files.pixieandpiratedestinations.com/uploads/1/3/1/4/131437683/6396286.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32343356061.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9177/files/64394515020.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/valudoxudasizajib.pdf
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/fitodufozinamunu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pexigubozorabavajodumixi.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/pogadarofupudub.pdf
    • https://cdn.shopify.com/s/files/1/0436/4818/8569/files/nijikufarijuwebini.pdf
    • https://cdn.shopify.com/s/files/1/0429/4580/6503/files/38141773786.pdf
    • https://cdn.shopify.com/s/files/1/0434/2808/5912/files/71236114055.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/nezudinetujuluvofib.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/34707652888.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1579/files/16023799312.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006184.bin
08346bac453d87251569e51c87b5a170d91d30048f2bd035ca7922f6174778eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6184 3292 bytes
font_01_sfnt_off00006d46.bin
17c1383365bd35e0dc12f00bdfd0c0d26a18cbd44a5c018b8c837f681024b02a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D46 5956 bytes
font_02_sfnt_off000081ac.bin
cd46fcffddcaa290476de958986909b6f154217a96b5d1cab58678dcadcf4df3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81AC 13232 bytes
font_03_sfnt_off0000ac59.bin
0117a77a4f1b9e583ec2ae7455b916c42432160385e7456939e5b3fa35b58022		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC59 16104 bytes

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