Malicious PDF — malware analysis report

Static analysis result for SHA-256 711db62764d18731…

MALICIOUS

PDF

45.7 KB Created: 2020-08-30 22:16:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f456d0b262a0403892107a83e8c28f85 SHA-1: de56623594c732f2f0d23cb6237aaecff12e6899 SHA-256: 711db62764d187312c79db01de6b6d9141af8541e640d16507ad2a056a497f03
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded links that redirect to known malicious infrastructure, specifically a redirector at ttraff.cc. The document body, though partially corrupted, contains text related to 'dirt bike guided tours' and the malicious URL, suggesting a lure to entice users to click on the malicious links. The presence of numerous external PDF links further indicates a link farm or SEO manipulation tactic, aiming to drive traffic to potentially harmful content.

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/wix?keyword=dirt+bike+guided+tours
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0df15e_75206f396c5f4549a23a09d2b6c31e27.pdf
    • https://static.usrfiles.com/ugd/8ab72e_5b41dc4938114a20acb7096a91ec5fd5.pdf
    • https://static.usrfiles.com/ugd/b0b521_f4d6c4555fe1469597d656a53f46e12b.pdf
    • https://static.usrfiles.com/ugd/b8c837_c43da73186f241f2ba3ecee6934d3962.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b7039da0d7347e782c7dc53500da723.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/27506820149.pdf
    • https://cdn.shopify.com/s/files/1/0449/2935/1835/files/aggregate_crushing_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/4326/6458/files/widifewodafazalaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/7392405635.pdf
    • https://cdn.shopify.com/s/files/1/0434/8595/4198/files/gusenigelarisoluzekumol.pdf
    • https://cdn.shopify.com/s/files/1/0433/5478/3893/files/attleboro_house_of_pizza_menu.pdf
    • https://cdn.shopify.com/s/files/1/0441/3207/3624/files/sat_bubble_answer_sheet.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_off0000766d.bin
f6e8d0477b3533c5231be16d0943f8492e4fb475bf73688f3af0fd0a00299564
pdf-font-stream PDF embedded font (sfnt) at offset 0x766D 4956 bytes
font_01_sfnt_off00008759.bin
a86137ae4663d725b3f5f1a376dacee3eae5beb2fe87c6292ddd7cb418f85eec
pdf-font-stream PDF embedded font (sfnt) at offset 0x8759 10284 bytes