Malicious PDF — malware analysis report

Static analysis result for SHA-256 45eb9e7f158ae850…

MALICIOUS

PDF

39.6 KB Created: 2020-08-10 07:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 383e8167162ea3e96729b4b4ccda113a SHA-1: 9440fae2821c6e754ae6187248932451a024df83 SHA-256: 45eb9e7f158ae850750c9c383e7bb4c51f68e42d92576c0a8ec3fce324971e58
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document also exhibits characteristics of a PDF link farm, with numerous embedded links to other PDF files, likely for SEO manipulation to increase visibility. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful 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=holy+quran+bangla+pronunciation+pdf
    • http://files.dnaleatherwa.com/uploads/1/3/0/7/130738814/8327209.pdf
    • http://files.adarecamping.com/uploads/1/3/0/8/130813461/98fe8a85c95f.pdf
    • http://dosodomad.cassadagabrighidswell.org/uploads/1/3/0/7/130775320/toxubogusoko.pdf
    • http://gepizirir.nowmetoo.com/uploads/1/3/1/4/131410007/teduf.pdf
    • https://cdn.shopify.com/s/files/1/0440/7430/3640/files/jupisuzogolalosifaje.pdf
    • https://cdn.shopify.com/s/files/1/0433/9643/2021/files/free_basic_english_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/febisu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/game_of_thrones_chaplin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7222/5442/files/wivijuludolej.pdf
    • https://cdn.shopify.com/s/files/1/0441/1287/1576/files/nugupevaregeliwu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/juziwalefarutise.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/tipuwogepelapi.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/kujonukatofa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2499/6773/files/mapowaruvatufuzexese.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/somegerisevunipepidigok.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/205682240.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_off00004ac4.bin
68789115eccf2cfbcd70aa308cebe25cdeaa4ef68e4bc6356057c47f39cc04a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC4 5472 bytes
font_01_sfnt_off00005d66.bin
40cb7acfe2ec7e5e1140f522bdd43820481cb902d427d4dedcd434152db7877a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D66 4648 bytes
font_02_sfnt_off00006c81.bin
6823a4cb8dd399595090516bf6ce02f0fa4e510453aee9548b42ade21b5410f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C81 10252 bytes

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