Malicious PDF — malware analysis report

Static analysis result for SHA-256 207d6f9084d3316b…

MALICIOUS

PDF

42.0 KB Created: 2020-08-07 03:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35a575b95e73fba692519a2ef2144383 SHA-1: b9ed57e5aefc4441b880aed1bbf1c9ac5f3f176b SHA-256: 207d6f9084d3316ba03d003c2830f4b17ef4bb61917c1d2b72db06e6da454dfc
152 Risk Score

Malware Insights

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

This PDF document is classified as malicious due to its use of a link farm containing numerous embedded URLs, many of which point to potentially malicious redirectors. The document body, though partially corrupted, contains text related to 'Inches to meter conversion chart pdf', suggesting a lure to disguise the malicious intent. The primary malicious URL identified is https://ttraff.ru/pify?keyword=inches+to+meter+conversion+chart+pdf, which is flagged as a known malicious redirector. The presence of multiple embedded links, including those hosted on cdn.shopify.com and various other file-sharing domains, indicates an attempt to obscure the final malicious destination.

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=inches+to+meter+conversion+chart+pdf
    • http://files.onlinehomemyaccsupport706.com/uploads/1/3/1/4/131482886/385fa.pdf
    • http://files.futsalwithoutborders.org/uploads/1/3/2/3/132303229/jatokusarojid.pdf
    • http://files.stacisstitches.com/uploads/1/3/2/6/132695294/fijalelu.pdf
    • http://files.gumke.com/uploads/1/3/1/4/131437689/voxafes.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/jadevawi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/rarewivibigezudovuzaxumoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/rilupujomanexovuzo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/lagexisemad.pdf
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/28353997959.pdf
    • https://cdn.shopify.com/s/files/1/0434/5610/2565/files/72400490089.pdf
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/rufapetiju.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3301/files/fojezube.pdf
    • https://cdn.shopify.com/s/files/1/0428/9049/4119/files/dulogapaze.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/que_es_el_sistema_renina_angiotensina_aldosterona.pdf
    • https://cdn.shopify.com/s/files/1/0433/7437/9164/files/judemumebubakivemovagemu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/zuzugexutego.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/50212566654.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_off00006748.bin
c849d3fd773aee1956d51788410126a0788c241ed50e167e9e7119ab2f86db70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6748 5360 bytes
font_01_sfnt_off00007960.bin
eeed9ba39dcc8763165fa3f77be2de8e7f36b143e6b64df5f4f0fceb36f1ba1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7960 9904 bytes

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