Malicious PDF — malware analysis report

Static analysis result for SHA-256 221d9f962c793c6d…

MALICIOUS

PDF

73.4 KB Created: 2020-08-19 02:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7c2e3871418a7a90d6434242860642a SHA-1: f88ab16286105fc81528806352d8ccbed6458f52 SHA-256: 221d9f962c793c6d4e2c476742914b8c8ade950f20be3d2aaba17eb606524caa
128 Risk Score

Malware Insights

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

This PDF document contains a mass of external links, masquerading as an apartment lease form. One of the primary links, 'https://ttraff.cc/pify?keyword=apartment+lease+form+chicago', is identified as a malicious redirector. The document also exhibits urgency language, further encouraging user interaction with the malicious links. The presence of numerous PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=apartment+lease+form+chicago
    • http://files.thedailydelaney.com/uploads/1/3/1/4/131453251/xatimemabiw.pdf
    • https://cdn.shopify.com/s/files/1/0447/9811/6006/files/wallpaper_city_guide_berlin_app.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2054/files/mitchell_flat_rate_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/32562290759.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/65083525260.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2984/files/bahubali_2_songs_naa_paata.pdf
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/cognitive_behaviour_therapy.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/wixovoporebob.pdf
    • https://cdn.shopify.com/s/files/1/0432/9937/3214/files/kejol.pdf
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/cch_chuyn_sang_file_hnh_nh.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9507/files/33318142128.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_off0000d5d2.bin
5c75e9ef7a9b510464af8949f77dece7e25f203d8ae165fc97bec6bbae18d34d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D2 5208 bytes
font_01_sfnt_off0000e74f.bin
13f8364d08541ff18637cb5443e87a4e5d8509cc18be969476ab107e21777a4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE74F 10336 bytes
font_02_sfnt_off00010ab9.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB9 4324 bytes

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