Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9505f10ea90d3eb…

MALICIOUS

PDF

70.7 KB Created: 2020-08-30 17:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5dbba12415b70214877fe9976acfbf1a SHA-1: 6c90c131a7f48aac7819337723930e07bb8f2b50 SHA-256: b9505f10ea90d3eb500d81a6c9695e358a1e42b8f042f162eafc701c2a7708e2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file was identified as malicious due to the presence of a large number of external links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One of the embedded URLs, 'https://ttraff.com/wix?keyword=f2p+quest+guide', is flagged as a known malicious redirector. While no scripts were extracted, the sheer volume of links and the malicious redirector strongly suggest an attempt to lure users to harmful sites.

Heuristics 3

  • 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.
  • 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/wix?keyword=f2p+quest+guide
    • https://static.usrfiles.com/ugd/b8c837_472fc1bcb105496188c35e0113760d50.pdf
    • https://static.usrfiles.com/ugd/69695d_0288c628e17c4a0c9d4e0a95a024d33d.pdf
    • https://static.usrfiles.com/ugd/b8c837_f3a5991bec5e4334a69d2fa0767e093f.pdf
    • https://static.usrfiles.com/ugd/b8c837_2b1b989530774fde974ad54fcf8eeda2.pdf
    • https://static.usrfiles.com/ugd/0d089b_f8dcbac077b34582ad56357674b259a7.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/chattels_list_template_nz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4488/7966/files/quantitative_aptitude_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/3375/4785/files/42403573909.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8165/files/96994421543.pdf
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/sefiga.pdf
    • https://static.usrfiles.com/ugd/b8c837_63d90ac156de4c11bdc0aa0bbbf60d20.pdf
    • https://static.usrfiles.com/ugd/b8c837_e9e377371a5b4457b6a196d957fd3a1a.pdf
    • https://static.usrfiles.com/ugd/b8c837_66e04090aa0b4d32b50ab3a6a798f051.pdf
    • https://static.usrfiles.com/ugd/704566_7abb869921a84ef787963104ff2a86e8.pdf
    • https://static.usrfiles.com/ugd/865d50_0aac886fc3304f00a64deb8400030915.pdf
    • https://static.usrfiles.com/ugd/b8c837_90377477b0904e5ababda945b3dd6dce.pdf
    • https://static.usrfiles.com/ugd/c8a981_e2e8c83aa2c74696805242fa812adace.pdf
    • https://static.usrfiles.com/ugd/60933b_e60f6217e12b47d8b84059d16911e0f5.pdf
    • https://static.usrfiles.com/ugd/daca0d_8a08945624eb4a80bcec511cf818c367.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_off0000d05d.bin
806e3371eaedd3e792388112a478e13ba2c1a0ecc2be7e9a7519bdc2252d48ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xD05D 5004 bytes
font_01_sfnt_off0000e177.bin
b336fd5398902f87e0b3d1e07b5a76683d0de54e7c79432aebe7d674b8671b0c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE177 14168 bytes