Malicious PDF — malware analysis report

Static analysis result for SHA-256 93da98e7de127fe2…

MALICIOUS

PDF

39.9 KB Created: 2020-08-02 01:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5c9cc14251a806de3e58f36a8f0d7a8 SHA-1: e1fcafcf8aade605c69dbb09b36b03e1405aa020 SHA-256: 93da98e7de127fe2c1a48aedf99111e2eb7bd6a5ba53eee39128a05f2e3ea807
152 Risk Score

Malware Insights

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

The PDF contains a link disguised as a service manual that redirects to a known malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate the document is designed to lead users to malicious sites. The ML classifier also strongly flagged this PDF as malicious. The document body contains the lure text and the malicious URL.

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=2004+honda+400ex+service+manual+pdf
    • http://files.beeftubes.com/uploads/1/3/1/6/131637640/dapevufotavo_katuwusizofi_goduwifiwojuru_juzotonaluv.pdf
    • http://files.nvhsbusiness.com/uploads/1/3/0/7/130776826/rejed-wiwubo.pdf
    • http://files.treeservicewichitafallstx.com/uploads/1/3/0/7/130775760/noxuxuderavotabavit.pdf
    • http://files.operationfof.org/uploads/1/3/1/4/131483371/tipodoberap_vepilupawuvepix.pdf
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/83033065347.pdf
    • https://cdn.shopify.com/s/files/1/0430/6327/9767/files/17586571492.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/68535078282.pdf
    • https://cdn.shopify.com/s/files/1/0432/7863/1072/files/55517892789.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/51591873765.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/35243943517.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/22146974054.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/wofufemowividalizatavarip.pdf
    • https://cdn.shopify.com/s/files/1/0431/7334/7488/files/pevazudezuxele.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nakoximowukod.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/42076841326.pdf
    • https://cdn.shopify.com/s/files/1/0429/0369/9615/files/sixebubukirefasetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6300/8664/files/93917927312.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fb7.bin
ecb4ab3e7a48addb66990a6f2ef2d55270a415210a622a6d7eb88b1bc40d01de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB7 5592 bytes
font_01_sfnt_off00006283.bin
7a4e95454e0042ea196dea5f7235731165e7177e387d1f514c1f77b76d4c9807		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6283 9428 bytes
font_02_sfnt_off0000828c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x828C 4324 bytes

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