Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa4bb55d905b128…

MALICIOUS

PDF

51.5 KB Created: 2020-08-15 03:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d3c7059da2b2744c06a0a5cac1e1694 SHA-1: 57ae5aa92d1e6b99806e0072a81285bd3423ad1c SHA-256: 7aa4bb55d905b1286667cf1268073222e7202677c9a7e08b8ba484e8583d2f70
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting the primary intent is to redirect the user to malicious infrastructure. No scripts were extracted, and the PDF structure itself is the vector for the attack.

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.ru/pify?keyword=que+es+variacion+genetica+pdf
    • http://files.teamzoecancersucks.com/uploads/1/3/1/8/131871721/2021789.pdf
    • http://files.rubensmachine.com/uploads/1/3/1/4/131406892/d9a63043cb9.pdf
    • http://files.andlau-in-alsace.com/uploads/1/3/1/3/131380539/zivanug-fazate.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7650/files/94575958981.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/divub.pdf
    • https://cdn.shopify.com/s/files/1/0433/7483/7925/files/arabic_numbers_1_1000.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2045/files/flatten_binary_tree_to_linked_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/desumit.pdf
    • https://cdn.shopify.com/s/files/1/0428/6427/9718/files/kotogegi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tikumakosesik.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/dieta_astringente_para_diabeticos.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1041/files/puzabugerivifugevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1361/1421/files/9356098741.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/discord_no_sound_from_others.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_off000087c1.bin
a19038148f75d243b802063e42e86b429e631915b59eef5a3c4a405704052a28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C1 5412 bytes
font_01_sfnt_off00009a3e.bin
07c0441b1278a65b5193c71ffc0fdfcfd3282be4110c34c99a5634eaed9b2bf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3E 11536 bytes

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