Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9907b4238d860c8…

MALICIOUS

PDF

42.9 KB Created: 2020-09-01 22:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22086f1b79d1bba2e61aedca1403a1a5 SHA-1: 6898fc58eca1afffa608ebaf20ea5f6367c3eca1 SHA-256: f9907b4238d860c87b9a11cc7b3ce46f04a476a127b01128b9122b4cc4b60c5b
130 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as an Android installation guide for a 'Blackberry leap'. This link, 'https://ttraff.me/wix?keyword=blackberry+leap+install+android', is flagged as a malicious redirector. The document also contains a large number of embedded links pointing to Shopify, likely an attempt to blend in or create a link farm. The presence of a 'download button' heuristic further supports the lure. The primary attack pattern is social engineering via a malicious link.

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.me/wix?keyword=blackberry+leap+install+android
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/14259265121.pdf
    • https://cdn.shopify.com/s/files/1/0434/3418/0769/files/28270985322.pdf
    • https://cdn.shopify.com/s/files/1/0441/2624/0920/files/27788455655.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/lukabesu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.pdf
    • https://cdn.shopify.com/s/files/1/0449/9714/8836/files/job_application_letter_example.pdf
    • https://cdn.shopify.com/s/files/1/0429/5370/3580/files/48605475271.pdf
    • https://cdn.shopify.com/s/files/1/0430/4030/9402/files/47923978321.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/biological_computers.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/funawinujawodufudafes.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0104/files/72103411806.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/chaos_theory_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9154/2681/files/notoxumibabinidalizumazu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4595/9333/files/51582007715.pdf
    • https://cdn.shopify.com/s/files/1/0433/1307/0238/files/xidigusux.pdf
    • https://cdn.shopify.com/s/files/1/0437/3151/7592/files/free_html_templates_w3layouts.pdf
    • https://cdn.shopify.com/s/files/1/0429/5409/6806/files/atharva_veda_in_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/1896360627.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_off0000693b.bin
b3c7d4473ceaf5cddf9cfc1f7f5c96eac5e6e6305c6f5104d4714ab2a650ac53
pdf-font-stream PDF embedded font (sfnt) at offset 0x693B 5424 bytes
font_01_sfnt_off00007bbf.bin
dc25d8189213bdc8689d74be6b35b38cbf7afb1e43e36da68d9493398b205a47
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBF 10152 bytes