Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b80a0ce6be78d68…

MALICIOUS

PDF

52.4 KB Created: 2020-08-18 18:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df036c55527485e20bf69563f9b7fb65 SHA-1: 5cab74a00f3ec6054930035f5891e5ff3a407b14 SHA-256: 8b80a0ce6be78d68ade520fb167fbf2fd11c30a76a5017cc4838368b278b633b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=vocals+loops+free'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify, suggesting a tactic to distribute malicious content or engage in SEO abuse. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of the redirector and link farm strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=vocals+loops+free
    • http://files.stemfutureleaders.com/uploads/1/3/1/4/131453127/ramidepemiruzato.pdf
    • http://kawag.girlinherbirks.com/uploads/1/3/0/8/130813694/putexegabowe.pdf
    • http://betado.truplans.net/uploads/1/3/1/4/131452842/kujafazo-jomonanusuwexi-metugisam-gapiloge.pdf
    • http://fotepup.drinkeuphoriacoffee2go.com/uploads/1/3/0/7/130776617/guxidavesu_zopazipapigi_polebox.pdf
    • http://files.carchethealing.com/uploads/1/3/1/8/131856380/2832449.pdf
    • https://cdn.shopify.com/s/files/1/0449/4006/6971/files/bullworker_x5.pdf
    • https://cdn.shopify.com/s/files/1/0431/4896/8090/files/gapugibanajid.pdf
    • https://cdn.shopify.com/s/files/1/0431/5686/5173/files/6443824452.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6872/files/sujatepupafawofuv.pdf
    • https://cdn.shopify.com/s/files/1/0429/0386/3459/files/xagajix.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/free_consonant_blend_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/13106755315.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b32.bin
b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B32 6588 bytes
font_01_sfnt_off00006bac.bin
41906b6af4b641835431b8b9db71acc19826447eecd119027e5c511e05519c00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAC 4972 bytes
font_02_sfnt_off00007c9a.bin
167cce252c18eb4ed3f65a1a3bf48dc3c194c4cd7308736aa4e4b1a161727f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9A 3268 bytes
font_03_sfnt_off000089e8.bin
712cf6ff7efbfca7e522c5d888917a2dd597a70088c83b17bbfc416d4ec0b77e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E8 10592 bytes
font_04_sfnt_off0000ae52.bin
12aba8d421747cc7b6f64e0779b2b7b17ec51a7e5f572de6077b2104e12ed3a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE52 16336 bytes

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