Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc82bc0c993668c…

MALICIOUS

PDF

54.9 KB Created: 2020-08-14 18:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fb67c61515628c3391dfc88c553df76 SHA-1: 15ee819aa72e5c51768815b14f15e54d0c9aef96 SHA-256: ffc82bc0c993668c420e92281ceabdec3024212a5f6e966a3776121677fa6c4d
120 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through a high density of embedded links, with a critical heuristic identifying a redirector link to 'ttraff.com'. This suggests a phishing or malware distribution attempt. The file also contains a large number of external PDF links, many hosted on 'cdn.shopify.com', which is flagged as a link farm. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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.com/pify?keyword=hey+brother+english+song
    • http://files.doyleqhs.com/uploads/1/3/1/3/131380445/b7410156f86c7.pdf
    • http://files.filmscorefans.com/uploads/1/3/0/8/130814581/rilixiroguj.pdf
    • http://files.commentingtogether.com/uploads/1/3/1/8/131871778/duzijonuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8022/0826/files/3373740922.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/zisefaminenupilokem.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/49217243095.pdf
    • https://cdn.shopify.com/s/files/1/0440/6971/6118/files/xuguzuvososobivozegada.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4151/files/38902839024.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/7789870489.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/tunejufegupubaxerizuba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/38218608124.pdf
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/29098113715.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/dudine.pdf
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/cambridge_pet_reading_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0438/9250/6779/files/cable_stayed_bridge_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/social_psychology_4th_edition_gilovich.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_off00008fac.bin
a72fdf77848a5168187baf00be21f79917bcf6daafa1840b289e67b2eccaae8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAC 4940 bytes
font_01_sfnt_off0000a07b.bin
c6af82ead3edfadb66bfbaba1d21df57a56e90f0691f21c9c53343571dce15be
pdf-font-stream PDF embedded font (sfnt) at offset 0xA07B 15112 bytes