Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4338d6ad05c67b0…

MALICIOUS

PDF

49.3 KB Created: 2020-08-24 11:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91ed21ee1273abbfe7a232624c02df45 SHA-1: c9c33e2e2a354eabb63ed6978114d2b25a67480c SHA-256: d4338d6ad05c67b053b918133f969c1cd63afeef97452395272072f32c3c6c19
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, specifically pointing to 'https://ttraff.ru/pify?keyword=dcfs+medical+form+illinois'. This URL is likely used to redirect the user to a malicious site, possibly disguised as a form. The document also contains a large number of embedded links, many hosted on Shopify, which is characteristic of SEO link farm techniques used to obscure malicious intent. No scripts were extracted, but the presence of the malicious redirector and the link farm strategy strongly suggests a phishing or scam attempt.

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=dcfs+medical+form+illinois
    • http://wimixi.everydayava.com/uploads/1/3/2/8/132815148/8271374.pdf
    • http://mevogewe.framece.com/uploads/1/3/1/4/131452825/zakob_pedawejavap.pdf
    • http://zosokotok.thewwiicampaigner.com/uploads/1/3/2/6/132681947/5175731.pdf
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/kiwotof.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9957/files/minecraft_giant_zombie.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/xenev.pdf
    • https://cdn.shopify.com/s/files/1/0435/4028/3541/files/89412642450.pdf
    • https://cdn.shopify.com/s/files/1/0447/2481/3977/files/panera_bread_box_lunch.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1196/files/46844516909.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0663/files/64523242951.pdf
    • https://cdn.shopify.com/s/files/1/0428/7175/0822/files/56509684417.pdf
    • https://cdn.shopify.com/s/files/1/0453/2440/2843/files/11879194204.pdf
    • https://cdn.shopify.com/s/files/1/0439/6823/3630/files/april_current_affairs_2020_study_iq.pdf
    • https://cdn.shopify.com/s/files/1/0431/5316/2394/files/regoxazofokiduki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/zazisetivepixenob.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_off000076e8.bin
3f08cb2e8c300ec4c38e4c0760d15475ec8b3b200d1a1a9ca3c27a43786b2426
pdf-font-stream PDF embedded font (sfnt) at offset 0x76E8 4872 bytes
font_01_sfnt_off0000874f.bin
459d68003f68f86a92c1e0f21b33b06dc95783b9b293497e590dcea99e8ff77f
pdf-font-stream PDF embedded font (sfnt) at offset 0x874F 10076 bytes
font_02_sfnt_off0000a9c3.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA9C3 4324 bytes