Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae1be76e70c0d36…

MALICIOUS

PDF

42.0 KB Created: 2020-08-25 06:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8009c1578c875302c3f2f721a1604ae5 SHA-1: 77564ace2b90053c9802fdaa3ce871addb3bd560 SHA-256: 6ae1be76e70c0d36bb2f5e6290d173facb46f7912a79e2d3cd44789449c52549
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a link farm, with 17 external links, many pointing to potentially malicious redirectors. The primary malicious link, https://ttraff.ru/pify?keyword=find+duplicate+rows+in+excel+spreadsheet, is designed to lure users by mimicking a search result. The document's structure and embedded links suggest it is part of a campaign to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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=find+duplicate+rows+in+excel+spreadsheet
    • http://files.wlprep.org/uploads/1/3/0/9/130969300/xusepa.pdf
    • http://tadibi.firstcovredoak.org/uploads/1/3/1/0/131070767/lorofewid_biguj_pipatapulejegur.pdf
    • http://xogivene.bossybastienne.com/uploads/1/3/0/7/130738918/7396697.pdf
    • http://seluzo.genawave.com/uploads/1/3/1/3/131398177/detanu_kavawape_zopenuri.pdf
    • http://mosegere.lesleywalkertherapy.com/uploads/1/3/1/8/131857920/7553901.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/barnett_jackal_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/3397915799.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1402/files/15599740649.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98629167596.pdf
    • https://cdn.shopify.com/s/files/1/0437/1909/8522/files/11996108321.pdf
    • https://cdn.shopify.com/s/files/1/0439/4765/5323/files/36359457109.pdf
    • https://cdn.shopify.com/s/files/1/0438/9378/4728/files/16488566976.pdf
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/16333417177.pdf
    • https://cdn.shopify.com/s/files/1/0432/5995/3312/files/20994896918.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/22101712416.pdf
    • https://cdn.shopify.com/s/files/1/0434/5911/7206/files/fogasavuluwot.pdf
    • https://cdn.shopify.com/s/files/1/0428/5415/4406/files/27700488871.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006631.bin
b67cfebf790fbc4b0de33d3862b56650aef3ffb18b9a974cab77de99534a2b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6631 5276 bytes
font_01_sfnt_off00007827.bin
21a178cf77652058c8a3813386d608c347cd86af5f0e7b3bcce936e8d10ca51b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7827 10008 bytes

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