Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d843ecd14401f51…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 17:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe261a655c03df0887769593441f9432 SHA-1: 38ad4a049bca78aa054003c0e632b30738b6b5e1 SHA-256: 4d843ecd14401f5118047b6c5e65d5cc4ecec94a9f7a3b3360bf4e60a99a22f5
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=texto+argumentativo+concepto+pdf'. Another heuristic identifies this as a PDF link farm, suggesting a coordinated effort to distribute malicious content. The document body itself is heavily obfuscated but contains the same lure text as the redirector URL.

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=texto+argumentativo+concepto+pdf
    • http://files.kskydonner.com/uploads/1/3/2/7/132741352/2e477e.pdf
    • http://files.twistedpantry.com/uploads/1/3/1/3/131381112/xilixirezej_kusilitutufadi_pabereregi_pomitexuzu.pdf
    • http://files.theovercoming.org/uploads/1/3/1/4/131438353/suwibirigefibef.pdf
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/felibavixupakewokin.pdf
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/sifezilibobonenon.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lajuvifubukakevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7587/files/hinario_aleluia_cifrado.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5300/files/domapagarutafenilofaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/siwojiwabomilojilupori.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/ranavop.pdf
    • https://cdn.shopify.com/s/files/1/0435/1308/6106/files/5980382078.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdf
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/savarifejinod.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/adobe_premiere_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/lenipovexerudumupelutefad.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_off0000627b.bin
415ce2f43c58c3677664f40f2666983ecfeb725520a33b6595c02a75273a6379		 pdf-font-stream PDF embedded font (sfnt) at offset 0x627B 5344 bytes
font_01_sfnt_off000074a0.bin
a6a17861076eb408784c86520cca8b3a8e6112dccde7cac64e39eaa5d4ed3ad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A0 10384 bytes

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