Malicious PDF — malware analysis report

Static analysis result for SHA-256 523da16c40907f37…

MALICIOUS

PDF

46.1 KB Created: 2020-07-30 22:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5427d1a736af43431ac47dc9fb48ed72 SHA-1: 8db6a7647be20b02a2cc34f8ac2f289f51b145f5 SHA-256: 523da16c40907f3764fb59c2f62193cb092dbb56283b7127dac0c90d93b5d632
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The presence of a 'download button' lure further supports a social engineering attack. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword suggesting a fake download. No scripts were extracted from this sample.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=free+download+pdf+to+jpg+converter
    • http://files.ljohnsonlab.com/uploads/1/3/1/1/131163533/foludog-ligojukexif-voxosup-valufasaxa.pdf
    • http://files.pickleball-germany.net/uploads/1/3/0/7/130775634/boxopamokufafame.pdf
    • http://files.bethelwoods.org/uploads/1/3/1/4/131406036/4783685.pdf
    • http://files.ljohnsonlab.com/uploads/1/3/1/1/131163533/fol
    • https://cdn.shopify.com/s/files/1/0430/5721/7693/files/tinijibawumelogomemawa.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/22281800100.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/pudel.pdf
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/mafitero.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/25078858802.pdf
    • https://cdn.shopify.com/s/files/1/0439/0918/5688/files/gibifudaburefexu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/56015787472.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0435/9313/8333/files/zosixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8217/7946/files/zuvovimisigexovaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/jugagurezenejavorinaj.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_off000078d9.bin
dc25b58eaab7ae719f5dd90e8810e2877e6e5e134700fda2e82ea29c8593237d
pdf-font-stream PDF embedded font (sfnt) at offset 0x78D9 5068 bytes
font_01_sfnt_off00008a49.bin
7e393d0102ad29dc2f267a073d382c927875d6a13de515bd97a2411b4cb22dc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A49 9704 bytes