Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f808e6086d0e49…

MALICIOUS

PDF

44.5 KB Created: 2020-08-19 18:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4277235913ae4f19b4c86a1956b9e0a7 SHA-1: 44d7c0e32f09c129c7da42fa60521d547b2c0b0a SHA-256: b5f808e6086d0e490fbf1b8ef1443e73117e8afb722857121fcda573b0fc58ea
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the text 'Performance appraisal hrm definition' and the malicious URL, suggesting a lure related to employment or performance reviews. The presence of numerous external PDF links, many hosted on shopify.com, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the ultimate destination. The primary malicious URL is https://ttraff.cc/pify?keyword=performance+appraisal+hrm+definition, which redirects to further content.

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=performance+appraisal+hrm+definition
    • http://files.jlmhomeimprovement.net/uploads/1/3/2/7/132740836/nezolelum_nusake_mufamezi.pdf
    • http://files.cantonfitnesscenter.com/uploads/1/3/1/4/131438437/7434290.pdf
    • http://files.mrksmathhelp.com/uploads/1/3/1/4/131454345/tebikotuzez.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/kathi_bgm_kuttyweb.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/cataracte_congnitale.pdf
    • https://cdn.shopify.com/s/files/1/0435/5365/2895/files/am_modulation_and_demodulation.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/23387886445.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/50547330627.pdf
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/soteferododifotulilax.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/safugurado.pdf
    • https://cdn.shopify.com/s/files/1/0433/4367/5560/files/12907264254.pdf
    • https://cdn.shopify.com/s/files/1/0436/6080/4249/files/ielts_academic_writing_task_2_sample_answer_band_9.pdf
    • https://cdn.shopify.com/s/files/1/0450/2441/1806/files/baricco_iliade.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7621/files/27629269263.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/webot.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_off000061c0.bin
9a04463219bb92a64799af0a9fc8e369fef2d904c6b56e9211abc46c8a5133a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x61C0 5184 bytes
font_01_sfnt_off0000731f.bin
832d53f38b3e23e3312c38cffbeda0744571c6bfec747a6c5cc8ca45d2201970
pdf-font-stream PDF embedded font (sfnt) at offset 0x731F 10392 bytes
font_02_sfnt_off000096a6.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x96A6 4324 bytes