Malicious PDF — malware analysis report

Static analysis result for SHA-256 e55122a4efa62316…

MALICIOUS

PDF

57.7 KB Created: 2020-08-18 21:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ae3c020d2553933733d37045938c666 SHA-1: ad9413de48fbd6d81a065f567b3e1ae4b94d54ed SHA-256: e55122a4efa6231639ccbd659aba89e05f1a1f881b2a994ce2100d9a7811bf46
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text referencing a "real doctors note for work template" and the malicious URL, indicating a social engineering lure. The primary malicious URL is `https://ttraff.cc/pify?keyword=real+doctors+note+for+work+template`, which is used to redirect the user to further malicious content.

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=real+doctors+note+for+work+template
    • http://files.emilyastoriandesign.com/uploads/1/3/1/1/131163590/7367301.pdf
    • https://cdn.shopify.com/s/files/1/0445/6284/1759/files/body_language_in_business.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/92011644206.pdf
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/calculus_early_transcendentals_briggs_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5821/7631/files/common_core_art_standards.pdf
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/zisebivawut.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/jewetevevilegadu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/51362050902.pdf
    • https://cdn.shopify.com/s/files/1/0454/1834/8712/files/96520845451.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/fallout_new_vegas_mod_pack.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9271/files/mimuxuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/2251/5351/files/conclusive_answer_synonym.pdf
    • https://cdn.shopify.com/s/files/1/0430/9028/0609/files/34207101173.pdf
    • https://cdn.shopify.com/s/files/1/0437/5881/3333/files/26413308435.pdf
    • https://cdn.shopify.com/s/files/1/0440/0542/5310/files/30754195051.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_off0000a49b.bin
68cf78462ecfc4a4f0e6041e4738cb74509b136d00f0a4edea5562c166a72e41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA49B 5464 bytes
font_01_sfnt_off0000b732.bin
7883abce7f82d0f1079ff870ec10ecf13c5d1364cce340820bba7ba66695d540		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB732 10036 bytes

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