Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9cbd004bc0a7e0…

MALICIOUS

PDF

44.4 KB Created: 2020-08-11 12:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bb86912683cd21d08187a56575d8158 SHA-1: a88f941241aadbf70c09244dd174d8143cdddcb3 SHA-256: 8a9cbd004bc0a7e05c545e189a44d35253a000f8f323ce8e1451adf74a13d872
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=modele+de+fiche+de+paie+pdf', likely leads to a malicious site. The PDF also contains a large number of external links, many pointing to benign Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute the malicious URL. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.cc/pify?keyword=modele+de+fiche+de+paie+pdf
    • http://files.houseofindians.info/uploads/1/3/1/6/131637374/wudomi_mixajasazozaz_litekokedo.pdf
    • http://files.chenewatsonmassage.com/uploads/1/3/2/7/132712235/sogonosixizavubor.pdf
    • http://files.chicagolandluxerentals.com/uploads/1/3/1/3/131383318/7857166.pdf
    • https://cdn.shopify.com/s/files/1/0429/9007/6057/files/tcs_birth_affidavit_format.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/wow_classic_large_fang.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6406/files/40482050816.pdf
    • https://cdn.shopify.com/s/files/1/0435/5283/3687/files/norerokavinasazemuxuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/8606/7352/files/36644593920.pdf
    • https://cdn.shopify.com/s/files/1/0430/8280/9508/files/xejokirixulajekisum.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/73414797141.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6672/files/11081046818.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/analytical_chemistry_for_technicians_third_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/68969190612.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/lebitafefuzozuna.pdf
    • https://cdn.shopify.com/s/files/1/0429/1490/6275/files/kezawikigagodikarebaja.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_off00006b24.bin
658da1ca654613b90e2b6063e18277316bfa42b7563baaefba886ea8b72617f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B24 4972 bytes
font_01_sfnt_off00007c14.bin
be72ed7b0814e5dbfc8d0d6d202071cef026838c5f4c4cb61cc6ddd883be779f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C14 12572 bytes

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