Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c89480b45a6fd1…

MALICIOUS

PDF

44.7 KB Created: 2020-07-22 12:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16edf59d04518f740e8e1bf89e15d871 SHA-1: d1b71beb333586dcc4fb60ce4c2f9d7ec0ef75d3 SHA-256: a0c89480b45a6fd174ed7d86cfd3121b0ad0bdd5eb8a99ba1a4f4b1f62463723
152 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click on the malicious link, likely for phishing or malware distribution.

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/wb?keyword=switch%20between%20excel%20worksheets
    • http://files.mountainlaureltennisclub.com/uploads/1/3/2/6/132695492/4d55d6.pdf
    • http://files.bruskeyns.com/uploads/1/3/0/7/130739456/kesiwamogilexog.pdf
    • http://files.bitsandbobsmv.com/uploads/1/3/1/0/131070508/lubibasu.pdf
    • http://files.belsbakes.com/uploads/1/3/1/3/131381900/talofesevajemugas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2122/1533/files/24954660546.pdf
    • https://cdn.shopify.com/s/files/1/0432/6912/8354/files/nekijupofovabeja.pdf
    • https://cdn.shopify.com/s/files/1/0433/2758/6457/files/zifida.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekugoxozeritazol.pdf
    • https://vukomalej.files.wordpress.com/2020/06/14102005747.pdf
    • https://kuperira.files.wordpress.com/2020/06/33495297047.pdf
    • https://sewugirub.files.wordpress.com/2020/07/salusefitinipexexonavajen.pdf
    • https://vofomuwex.files.wordpress.com/2020/06/66443231192.pdf
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/fufijusebir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7074967355.pdf
    • https://cdn.shopify.com/s/files/1/0436/2086/0064/files/mibijisilazenovesiva.pdf
    • https://cdn.shopify.com/s/files/1/0438/7245/2776/files/27491440962.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9430/files/97086665053.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/rekev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kexikebesadunav.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/
    • https://cdn.shopify.com/s/fi

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072ca.bin
2770fb68d98232939181c374702789df6a2539f5ba1ba3f6bf799adbd4159c83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CA 4932 bytes
font_01_sfnt_off00008382.bin
82f7246a6b88770094ec5e6d37349b81c6c154f6286b3e344a1075a81614e8f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8382 9948 bytes

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