Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c96e809995f3b61…

MALICIOUS

PDF

73.7 KB Created: 2020-08-01 06:09:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb883ba3ed01e22f433d1a310ca716cd SHA-1: 8ffeae596526e1cb419484af820115d6e945429e SHA-256: 8c96e809995f3b61d30a66e33aa264aac9faff03b910a757644580eb6c94be94
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=ogre+kingdoms+army+book+pdf', suggesting a lure for users interested in 'ogre kingdoms army book pdf'. The ML classifier strongly flagged this PDF as malicious. The presence of numerous Shopify URLs suggests an attempt to blend malicious links with seemingly benign content.

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=ogre+kingdoms+army+book+pdf
    • http://files.newbrookschool.org/uploads/1/3/0/7/130775808/tefifazitexaxa.pdf
    • http://files.michigansaf.org/uploads/1/3/1/1/131164202/3352147.pdf
    • http://files.nutritionrites.com/uploads/1/3/0/7/130739615/9ae7740f4f689a.pdf
    • http://files.whateverhetellsyou.com/uploads/1/3/0/7/130775828/sigopavomokilofov.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3382/files/84667312547.pdf
    • https://cdn.shopify.com/s/files/1/0428/2236/9446/files/56828507887.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/34610213349.pdf
    • https://cdn.shopify.com/s/files/1/0431/2131/1898/files/91795199406.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/pawaluluparanif.pdf
    • https://cdn.shopify.com/s/files/1/0434/5918/2745/files/losoworijovogawima.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8127/files/wufudidokozorekidasize.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/27480007280.pdf
    • https://cdn.shopify.com/s/files/1/0433/9109/0844/files/nozovizukazifu.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/bapunobiruluxoxir.pdf
    • https://cdn.shopify.com/s/files/1/0436/1804/2018/files/42825714947.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_off0000e225.bin
efe7f9783f7167f8214a537dfe167061fcec865e404d12290fbb642538b20914
pdf-font-stream PDF embedded font (sfnt) at offset 0xE225 5660 bytes
font_01_sfnt_off0000f55a.bin
f029b3829b96e2a76c875b5312daccc711467364a30ba269972a74d51c4a31f7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF55A 10620 bytes