Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cad85021eee951…

MALICIOUS

PDF

102.7 KB Created: 2020-08-05 11:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c4044746f40f71dc6f12e6e900312e2e SHA-1: 793d8448d3de51e78f8fff93997b94db4da65d7f SHA-256: 04cad85021eee9510aff0cdc4c5c1867a55ae889baa83f74521bffc0b12b45fc
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a link to a solutions manual. This indicates a likely phishing or malware distribution attempt. The PDF also contains a large number of external links, many pointing to Shopify, suggesting an attempt to blend in with legitimate content while distributing malicious links. No scripts were extracted, but the presence of the malicious redirector and the lure content strongly suggests a malicious intent.

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=fundamentals+of+cost+accounting+6th+edition+solutions+manual+pdf
    • http://files.thefinishdepot.com/uploads/1/3/1/3/131398006/nofifevoxopunedejalu.pdf
    • http://files.westofthemissouri.com/uploads/1/3/0/8/130814630/paluxunawefom.pdf
    • http://files.lakecountyiltransition.com/uploads/1/3/0/7/130739154/775147.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/zivabinoxewifewedibevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40948382406.pdf
    • https://cdn.shopify.com/s/files/1/0430/6167/4133/files/fifus.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/38069173529.pdf
    • https://cdn.shopify.com/s/files/1/0434/3005/2005/files/40316716586.pdf
    • https://cdn.shopify.com/s/files/1/0427/9674/4871/files/www_notdoppler_comn.pdf
    • https://cdn.shopify.com/s/files/1/0438/0003/5485/files/10819640220.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1097/files/alternating_current_circuits_by_corcoran_4th_edition_solution.pdf
    • https://cdn.shopify.com/s/files/1/0429/0360/1308/files/90041984737.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rofan.pdf
    • https://cdn.shopify.com/s/files/1/0432/4117/7248/files/16026791703.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_off000137f2.bin
2293a98e5517e718f4493d68783bf8a4a15c41e1526beb1bc626c8fb94603f7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137F2 5580 bytes
font_01_sfnt_off00014ad1.bin
9fad5c143f2c81f2940cedd9cc1dee17dcfe6671d269730c301876c5673d22f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD1 14136 bytes
font_02_sfnt_off0001778e.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1778E 16204 bytes

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