Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3165b992e124206…

MALICIOUS

PDF

79.6 KB Created: 2020-08-05 13:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f45d05d2150fcbbdbf384ea9db8f8e8 SHA-1: 1da38959d1565dbe61a598560765527fdac4f4ef SHA-256: f3165b992e124206c429aafbcd00689190bf4bad27a155fdc6bbd032887b4403
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a 'zoology book' and the PDF creation tool 'wkhtmltopdf', suggesting a lure to disguise the malicious link. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic to drive traffic to the malicious redirector.

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.com/pify?keyword=11th+zoology+book+in+tamil+medium+pdf
    • http://loxowiza.emigracing.com/uploads/1/3/1/3/131379578/9597804.pdf
    • http://files.incarnationlutheran.com/uploads/1/3/1/6/131606758/kawurigugamoza-zojegag.pdf
    • http://files.reimagineec.com/uploads/1/3/1/6/131606755/c4c08.pdf
    • http://files.eleftherianoslab.org/uploads/1/3/1/8/131856956/40de4dc055458.pdf
    • http://files.infantmassagenewzealand.org/uploads/1/3/0/7/130738741/xotarelagaxes_mamupuzuda_lajosulufujiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8535/6449/files/lapaterimunoko.pdf
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/92154501384.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/jimisagapinafozatizoji.pdf
    • https://cdn.shopify.com/s/files/1/0438/6599/7472/files/87913015640.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/81587660738.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/98332210554.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/23785821067.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/criteria_air_pollutants.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1973/files/etiologi_bronkitis_akut.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/jimewopupex.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000cd9d.bin
2bec690fbfc333550c04690057d0eb1b463b0a16a856655a4bdc6e1f509ce84d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xCD9D 20188 bytes
font_00_sfnt_off0000bafa.bin
72c7cd2f00438e8260cfca81ab72730e1f16398cb253f14e5362170301b93308		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAFA 5496 bytes
font_02_sfnt_off0000f913.bin
852a1fa4af9cca354e5bb6d7027818e1306fd22a38183d69482029c97b4e7b5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF913 14284 bytes
font_03_sfnt_off00012514.bin
9a3e7af0855b0971ed4e960d1afbabbea6ba84bf45843a09ca44cec8f7261173		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12514 2832 bytes

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