Malicious PDF — malware analysis report

Static analysis result for SHA-256 1daad8bd5a46f07d…

MALICIOUS

PDF

43.6 KB Created: 2020-08-23 07:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22bc6b1c5a7861b43f784a406e58a444 SHA-1: 2bbe1b9008f51851e84ece6a13209d49780f2322 SHA-256: 1daad8bd5a46f07d260af204c68d5f9af0124f4083ff31dc1adbf5bb6219feaf
142 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector link disguised as an Android application download. The document body text, though heavily corrupted, contains references to 'Android messages 2.9 apk' and embedded URLs, reinforcing the lure. The primary malicious URL is 'https://ttraff.ru/pify?keyword=android+messages+2.+9+apk', which likely serves as a gateway to further malicious content. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a tactic to manipulate search engine results or distribute payloads.

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=android+messages+2.+9+apk
    • http://pebule.championcleaning.net/uploads/1/3/1/3/131382134/8272b4cb409.pdf
    • http://files.dlogiceu.com/uploads/1/3/0/9/130969710/motalixigi.pdf
    • http://files.mentororchestra.com/uploads/1/3/1/4/131484395/mabemejabo-xolamo.pdf
    • http://files.marriedmarks.com/uploads/1/3/2/8/132816158/wawezanuz-titun-resuta-ponupax.pdf
    • http://buzako.cannabamacbd.com/uploads/1/3/1/4/131483418/9057953.pdf
    • https://cdn.shopify.com/s/files/1/0438/9208/0795/files/tafixilesesesuzumixojonex.pdf
    • https://cdn.shopify.com/s/files/1/0428/1915/8183/files/givixe.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/fewenapetezenewipuboj.pdf
    • https://cdn.shopify.com/s/files/1/0447/0249/8970/files/audiobook_application_android.pdf
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/definition_automate_programmable.pdf
    • https://cdn.shopify.com/s/files/1/0434/1910/7480/files/81439912612.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7708/files/black_s_law_dictionary_4th_edition_unabridged.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0093/files/tovifumukupazen.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1626/files/the_south_african_constitution.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/tekikukada.pdf
    • https://cdn.shopify.com/s/files/1/0427/7554/3964/files/naroguza.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_off00005fb9.bin
32dd4ca5ef40e381645cd9da5884b72ef7bce42fda59d6c3bfbab5a0d0aadbb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB9 5620 bytes
font_01_sfnt_off000072cb.bin
940a98c374d016d8307f4a969e5b5dd62ebfb5eb7b60a5c844fe40cac995092e
pdf-font-stream PDF embedded font (sfnt) at offset 0x72CB 15028 bytes