Malicious PDF — malware analysis report

Static analysis result for SHA-256 651c04de366b1edb…

MALICIOUS

PDF

122.5 KB Created: 2020-08-10 15:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 532f4f041f344ac749119ae1597b25c7 SHA-1: 4f46796c8923ba0fc1d9e0ed6a383cd34868d5b5 SHA-256: 651c04de366b1edbc0849cf614db2657b7f8707d3243636cccc09f6497f614ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, with a critical heuristic identifying it as a redirector link farm. The primary link, 'https://ttraff.com/pify?keyword=next+century+mathematics+statistics+and+probability+pdf', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious redirection as legitimate content. The presence of many links, including to Shopify, indicates a likely SEO-based lure to drive traffic to malicious sites.

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=next+century+mathematics+statistics+and+probability+pdf
    • http://files.amcdigitalarts.com/uploads/1/3/0/9/130969065/fukulaxuxekiwag_sinimapoka_zarekagarolaxa.pdf
    • http://files.dkg-betadelta.org/uploads/1/3/2/3/132303068/2014468.pdf
    • http://files.minjinkim.com/uploads/1/3/2/6/132696580/vilejikoroka_nonikijulem.pdf
    • http://files.salemsscissors.com/uploads/1/3/1/3/131383575/9177a7d5.pdf
    • http://files.cgfcjesusislord.org/uploads/1/3/1/0/131069934/5500180.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4071/0566/files/manapolifazipelulurerav.pdf
    • https://cdn.shopify.com/s/files/1/0437/8283/2280/files/78159906319.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/17434650948.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/suzodawifugefagawujob.pdf
    • https://cdn.shopify.com/s/files/1/0439/1829/5195/files/65486629235.pdf
    • https://cdn.shopify.com/s/files/1/0438/9198/2491/files/28102638411.pdf
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/magumemamenatex.pdf
    • https://cdn.shopify.com/s/files/1/0432/6732/6112/files/kisuxowupuxaxewubi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1087/5815/files/wuxafutuxuzuvutu.pdf
    • https://cdn.shopify.com/s/files/1/0438/2828/1506/files/nisegane.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001878c.bin
07044c594686d6a802ffdea7bc1677786eb7cf86ce8a6f55f740fab352e6cb37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1878C 5672 bytes
font_01_sfnt_off00019aad.bin
efaca86bcda6e7ccd7d2a935c1a89a5829a8d1bc603c590b74dbd462e85ef8d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19AAD 13792 bytes
font_02_sfnt_off0001c677.bin
d9b012042df5fe8dc074c42eae0f7627b15178249d85eb70dc7afc452d134ec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C677 16132 bytes

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