Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbbb95b14c33ada…

MALICIOUS

PDF

45.5 KB Created: 2020-07-19 05:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2a01277c59734e035c5f82c71008e30c SHA-1: 30d8cc292620cf289b2f9f3711d91a86eb6b5521 SHA-256: 2fbbb95b14c33ada5804c722905ebe4d9044452af161e80dd25358d7b3ddbb06
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm behavior, with numerous external links, many hosted on WordPress.com. The ML classifier also 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 delivery.

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=gigabyte%20z390%20aorus%20pro%20manual
    • http://files.florologie.com/uploads/1/3/2/7/132741433/buxesozijinuj-buzug-vumalawaniwim-junuxasoda.pdf
    • http://files.t-ris.com/uploads/1/3/0/9/130969446/a008e716.pdf
    • http://files.jacquelinesdancestudio.com/uploads/1/3/1/3/131397950/gagibalu_tifosajerafu.pdf
    • http://files.wmmclick.com/uploads/1/3/1/4/131453036/2315035.pdf
    • http://files.ja
    • https://pimibaxufu.files.wordpress.com/2020/07/ziluwowogumapego.pdf
    • https://zodudawizif.files.wordpress.com/2020/07/16397158218.pdf
    • https://jadevumavipo.files.wordpress.com/2020/07/79615717200.pdf
    • https://bedurezagofu.files.wordpress.com/2020/06/78881948314.pdf
    • https://kapavefewo.files.wordpress.com/2020/06/komowapejewiselurexisisa.pdf
    • https://tezozila.files.wordpress.com/2020/06/bibexivaseputaj.pdf
    • https://riverazirot.files.wordpress.com/2020/07/69163613290.pdf
    • https://norofila.files.wordpress.com/2020/06/34005261560.pdf
    • https://genirun.files.wordpress.com/2020/07/xitepatawew.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/91408131862.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5743/files/57793901931.pdf
    • https://cdn.shopify.com/s/files/1/0428/7974/6207/files/nodelikafemufalul.pdf
    • https://cdn.shopify.com/s/files/1/0432/2004/1886/files/86465775220.pdf
    • https://cdn.shopify.com/s/files/1/0430/2821/8010/files/75597124393.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/97032828727.pdf
    • https://cdn.shopify.com/s/files/1/0431/4185/7448/files/3250956689.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/71395141566.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_off000071dc.bin
35f4669728fc3f957195b65841f64d26a4778b27878964b53a36f5f6a1c2e256		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71DC 5808 bytes
font_01_sfnt_off00008595.bin
b8a1b85d78d3e3f2d1f5a326b1ddc9e153efd8ff447d8b784250b3396a11ac93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8595 10304 bytes

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