Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8dd6e36f7dddb9…

MALICIOUS

PDF

44.4 KB Created: 2020-08-18 23:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4333405e38b907db2e72f53c6f262f85 SHA-1: 9c7a42999712c8811bbf3ea6fe4ca7a59c2d6bcc SHA-256: ff8dd6e36f7dddb941d93bd306694d17fbf85f6e15893ef879a2dbf3a62e52ce
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains text related to medication dosage and the malicious redirector URL. This suggests the PDF is designed to trick users into clicking malicious links under the guise of providing information, likely leading to further malware or phishing.

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=budesonida+formoterol+dosis+pediatrica
    • http://wosipixe.kalinachung.com/uploads/1/3/1/8/131871825/5710226.pdf
    • http://files.fairparkchurchofchrist.com/uploads/1/3/1/4/131437378/6231181.pdf
    • http://roletuzil.tackculture.com/uploads/1/3/1/4/131407222/zatevinikarevi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6011/8175/files/mivekupidawetutimosuse.pdf
    • https://cdn.shopify.com/s/files/1/0433/2525/9944/files/kujutivukiligijalaruge.pdf
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/78302603322.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3447/files/lalojopanuwaxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/68151081999.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/lisep.pdf
    • https://cdn.shopify.com/s/files/1/0427/9386/1279/files/65691060046.pdf
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/beyond_compare_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/1046/4667/files/lawulurezimedolumibexaj.pdf
    • https://cdn.shopify.com/s/files/1/0439/4024/9755/files/cgegis_table_june_2020.pdf
    • https://cdn.shopify.com/s/files/1/0449/1545/8215/files/causes_of_acute_pulmonary_edema.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_off00007037.bin
f930a8650cbb2eca7822c1b93a4e6b6d5380efc7d618659bf0a7d4cb88beff16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7037 5348 bytes
font_01_sfnt_off00008248.bin
f053465b3d88f32ee02a06da60ac33af186276bb7dad446a184912fa230150df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8248 10120 bytes

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