Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6beee45426c808d…

MALICIOUS

PDF

44.2 KB Created: 2020-08-22 19:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63b1597d698dad1f7ed85c8e165f9330 SHA-1: f41ed41e9af33b2f41d99af98ebabf9e63d0d775 SHA-256: a6beee45426c808d07c0585c64903e3286ac31cebfa6dea257706a0d8f6fc6ac
160 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'spelling numbers' and includes the malicious URL. The presence of a 'LOLBin command execution instruction' heuristic suggests potential for further malicious activity, likely initiated by the user clicking the 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=spelling+numbers+1+to+100+worksheets+pdf
    • http://files.emilytvanek.com/uploads/1/3/1/3/131382032/pamafa_wamajinimisa_vefapatukuze.pdf
    • http://files.anxious-but-fabulous.com/uploads/1/3/1/4/131484328/bojazob.pdf
    • http://files.nicholasruscettaart.com/uploads/1/3/1/4/131453651/6275953.pdf
    • http://jaraluf.lydiasjourney.com/uploads/1/3/1/4/131408229/fd44d6b.pdf
    • http://files.curleyscience.com/uploads/1/3/0/7/130740477/busifunopujovo_zakupexibapin_sapujatobukexav_bigolorotiki.pdf
    • https://cdn.shopify.com/s/files/1/0432/5962/5627/files/nevoxaludemiwifax.pdf
    • https://cdn.shopify.com/s/files/1/0433/9154/9590/files/drugstore_cowboy_james_fogle.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/welojubalata.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/bunavaxutugafi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nuruge.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1081/files/jijexozunugedipewori.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9637/files/dell_r710_hardware_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/7787512126.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9715790575.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8686/files/rebalasonusatoxumem.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/speak_well_english_book_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7381/files/gungeon_heavy_boots.pdf
    • https://cdn.shopify.com/s/files/1/0451/7868/3541/files/crack_ielts_in_a_flash_speaking_1.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_off00006203.bin
b0ed891232af32fce07d011aa55508dfe152c49b0a7b02dfdf2ce4640bd7441c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6203 5720 bytes
font_01_sfnt_off0000755c.bin
bfdb3a16b9751b6389679084c25b70bd903bd89dbf5c1de856c333dd763b2773		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755C 9468 bytes
font_02_sfnt_off000095b5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B5 4324 bytes

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