Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb1f53241bbbd43c…

MALICIOUS

PDF

54.0 KB Created: 2020-08-31 20:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7504a0ec9d049d0959faa92f7903abc3 SHA-1: 24efd91ea7a687ffab7ab1c9ee577931320ccaa9 SHA-256: cb1f53241bbbd43ca34c2292fb5e184a657960540da0fca4c70c5a01b12ed775
128 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and links to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, contains text suggesting it is a user guide, which is a common lure for phishing or malware delivery. The presence of numerous external PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. The primary malicious IOC is the redirector URL, which likely leads to further 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=alcatel+pixi+3+user+guide
    • https://static.usrfiles.com/ugd/516793_9708086b7591433ebaf7813f3950e233.pdf
    • https://static.usrfiles.com/ugd/ab63e3_a24eb26254d54934bfdbdda7c7422759.pdf
    • https://static.usrfiles.com/ugd/4b874d_9d97f3d2ac0f4287b962b90825630f16.pdf
    • https://static.usrfiles.com/ugd/b8c837_b04b151de58545ecbe6dbab3f5d30991.pdf
    • https://static.usrfiles.com/ugd/fbccce_d44e5d3c25e24ba289d74f3ce801d244.pdf
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/aphis_gossypii_glover.pdf
    • https://cdn.shopify.com/s/files/1/0460/2249/2319/files/hillsong_praise_and_worship_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/the_negro_mother_langston_hughes.pdf
    • https://cdn.shopify.com/s/files/1/0436/4887/6702/files/how_to_save_in_kingdom_come_delivera.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/55873085747.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/sabozuj.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/11760285304.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fe8.bin
ce22c8eaa1f53a77d563481fc3f0abc202627ce0e69ac912df19b60822d178aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE8 3724 bytes
font_01_sfnt_off00006d15.bin
289918ef31f5f544664a028fc757a59255b21f2dc1b34134ebebc19b6bfdc2f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D15 1908 bytes
font_02_sfnt_off00007626.bin
eb246e1d4d94affd03da5cc4181ebb2f164d0e372783f353b47008c8c0fe2f03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7626 5128 bytes
font_03_sfnt_off0000879e.bin
7d1d8f4167c36277c8fe71225fbdc31aaaca98204796b18c2f8b3e083a802a80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x879E 2048 bytes
font_04_sfnt_off0000907d.bin
b754a0a0e4119e444934f73f374236460cb580fcd431721440fed807a9a2ead6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x907D 13684 bytes
font_05_sfnt_off0000bb8d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8D 4324 bytes

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