Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b3111f58c35e1f1…

MALICIOUS

PDF

56.7 KB Created: 2020-08-10 05:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af7ba389b18c125fd059e8f4b918ee51 SHA-1: 761a314fd7722e0ce8a559ef62c4a156150dde08 SHA-256: 3b3111f58c35e1f1b6d6544e587cfea6699c9f7ce2fd5d6d96db27007df7657a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=les+accords+en+musique+guitare+pdf, which is likely used to redirect the user to a subsequent stage of the attack. The document body, though partially corrupted, contains text related to guitar chords, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=les+accords+en+musique+guitare+pdf
    • http://files.carrieradzevicius.com/uploads/1/3/2/7/132740270/7a35d14d6d.pdf
    • http://files.reikisimo.com/uploads/1/3/1/4/131438142/zaxutumikuk_sazewujaxi.pdf
    • http://files.tollyho.com/uploads/1/3/1/8/131856949/8558521.pdf
    • http://files.daughtersofthenewmoon.com/uploads/1/3/1/4/131406893/zevedabarij.pdf
    • http://files.berncograssrootsdems.com/uploads/1/3/2/6/132681767/8714975.pdf
    • https://cdn.shopify.com/s/files/1/0432/1230/8637/files/sevopidodejaziwekotepari.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/26798459258.pdf
    • https://cdn.shopify.com/s/files/1/0435/6331/9445/files/nedosukovaxiza.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/academic_journal_articles.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84113106953.pdf
    • https://cdn.shopify.com/s/files/1/0428/1021/2518/files/arban_trumpet_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/xemumirugufedoja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/91151072412.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/79265008839.pdf
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/xenamekepopekamamabevewo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/jixovigo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6418/8312/files/49841828796.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008579.bin
803f57d9d4c7052ecaf432a98b174c4c033b16e0df747aec8699a66cbd641b15
pdf-font-stream PDF embedded font (sfnt) at offset 0x8579 5512 bytes
font_01_sfnt_off0000981b.bin
d8cbe09a6a6615dc3012fa89d4913abe9943d80efd230102a0a3f7b0d7dd6994
pdf-font-stream PDF embedded font (sfnt) at offset 0x981B 11988 bytes
font_02_sfnt_off0000bdb8.bin
aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB8 16312 bytes