Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa928a61a4a67be5…

MALICIOUS

PDF

38.6 KB Created: 2020-08-24 15:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ae182bead283877c24a138a3179bf3e SHA-1: 79cc667dff35d85d8e38b718ea7394a49227a971 SHA-256: fa928a61a4a67be5bbb6c8fee27f8a08433bdedfd471c561258023789f35eab7
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=android+1+games+candy+crush+jelly+saga', is designed to lure users into clicking it by pretending to offer a game download. The file also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, many hosted on Shopify. The primary malicious URL is the most critical IOC.

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.cc/pify?keyword=android+1+games+candy+crush+jelly+saga
    • http://files.forsythsfrostedfancies.com/uploads/1/3/0/9/130968988/kigipururababab.pdf
    • https://cdn.shopify.com/s/files/1/0433/8837/1107/files/rikimavitagibepaxugo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5770/8193/files/princpios_da_administrao_pblica_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/momijo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1575/6182/files/bullet_points_in_powerpoint_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/nenoful.pdf
    • https://cdn.shopify.com/s/files/1/0447/8690/9341/files/83623734645.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/35024217038.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/mosupelovamogelumoxini.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/35508379295.pdf
    • https://cdn.shopify.com/s/files/1/0429/7369/2063/files/interpreting_apocalyptic_literature.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_off00005892.bin
8fe9502005a90159fca61790138fe10a25091076d6673aea94194bbbf5b20c1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5892 5572 bytes
font_01_sfnt_off00006b5f.bin
479c6562903a0829f0cd8a7945c160f731ef45500f596ea472f7ab51e1f44d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5F 10072 bytes

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