Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4188c3081cff2e…

MALICIOUS

PDF

44.5 KB Created: 2020-07-31 00:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea9af4b075bb6f5abf6f7196eabf2ac0 SHA-1: b705c628f188caf762c66d6e0fa5f05304a9d57f SHA-256: ff4188c3081cff2e899d491cfa36ee71526e1f6f6b724846e4d921c39f8c46a0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a malicious link disguised as a document about 'Terapi pneumonia pada anak pdf'. This link redirects to 'ttraff.com', which is identified as a malicious redirector. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm for SEO poisoning or to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=terapi+pneumonia+pada+anak+pdf
    • http://files.mainecoonselfie.com/uploads/1/3/0/7/130775432/vosunusisomimomeja.pdf
    • http://files.canaanchristianministries.co.uk/uploads/1/3/1/6/131607131/907378.pdf
    • http://files.fenwaywestfield.com/uploads/1/3/2/6/132681033/c264ee13e.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/garevezixijinutewupefodab.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/dabewajete.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/16966946160.pdf
    • https://cdn.shopify.com/s/files/1/0437/6834/8830/files/mulidejapazol.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/lotumasajifakizatume.pdf
    • https://cdn.shopify.com/s/files/1/0432/5870/8118/files/tupiselaro.pdf
    • https://cdn.shopify.com/s/files/1/0435/0436/9816/files/74954375655.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/86116709737.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/zebuxozupidutizezonebuti.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kirojaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/5485/7369/files/60879910707.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/
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/lot

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071e5.bin
975488b607a29d1db15dd84c44f63efe1784db15f75274c24024c033fe548b51
pdf-font-stream PDF embedded font (sfnt) at offset 0x71E5 4792 bytes
font_01_sfnt_off0000820b.bin
f2c2e6508cf2918da79d42a34a3e8c90f01fe09f5b3e8d890b61228c66e3919b
pdf-font-stream PDF embedded font (sfnt) at offset 0x820B 10160 bytes