Malicious PDF — malware analysis report

Static analysis result for SHA-256 a40b4ed7e368d010…

MALICIOUS

PDF

39.4 KB Created: 2020-08-11 08:16:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 070212dbf22760b45e5c058d5066a8ac SHA-1: 8a9c9d154bbfa72b9a8394d7e33cfb17bba28b62 SHA-256: a40b4ed7e368d010291a33fd4aba9a43221d3889d93ebe7adeb571e7e2f2ec8d
150 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to Shopify domains, but one critical link to 'ttraff.ru' is identified as a malicious redirector. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive document content and malicious links.

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=libro+logistica+administracion+de+la+cadena+de+suministro+pdf
    • http://files.macongalinks.org/uploads/1/3/0/7/130738666/jagejibokena.pdf
    • http://lixapa.fastbreaklacrosse.com/uploads/1/3/1/6/131606875/3364073.pdf
    • http://wojobu.threeoakwines.com/uploads/1/3/1/8/131872055/8637597.pdf
    • http://files.siyuanlipiano.com/uploads/1/3/1/1/131163969/954d1.pdf
    • http://files.wichitarosesociety.org/uploads/1/3/1/4/131409274/574255cc67ac70.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/pekulefizidofewawoxikibi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2346/files/gepugopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6001/files/deux_arabesque_debussy.pdf
    • https://cdn.shopify.com/s/files/1/0431/1079/3370/files/xazabolule.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/lean_accounting_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0429/7588/7523/files/74657014838.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavokalozetaxolemo.pdf
    • https://cdn.shopify.com/s/files/1/0428/3983/4780/files/attack_on_titan_season_2_dubbed_online.pdf
    • https://cdn.shopify.com/s/files/1/0434/0498/4474/files/98508959038.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/juxotalativasokokug.pdf
    • https://cdn.shopify.com/s/files/1/0434/3532/7653/files/lovopubig.pdf
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/vifavatisuxuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/74064800119.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_off000058aa.bin
41d06164c856aa3c85bd3ac35e8bfbece51f0cfdc46dfaab0cfee0e77f9acca4
pdf-font-stream PDF embedded font (sfnt) at offset 0x58AA 5556 bytes
font_01_sfnt_off00006b70.bin
76d4a6693775b3ab71bb1ef55550514a46e7bf6f582de1691ce1ebd701e73666
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B70 10704 bytes