Malicious PDF — malware analysis report

Static analysis result for SHA-256 9378a321f743aeb3…

MALICIOUS

PDF

43.4 KB Created: 2020-08-11 09:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffd6561ee4cc091eae1b84efa855fa41 SHA-1: 24fb7f09f33531a403da9fa596085e922680563b SHA-256: 9378a321f743aeb3998bf1a882f36776e9e9b3b688d3da41ec6643ff276eca91
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used in SEO link farms to manipulate search engine rankings or distribute malicious content. One of the primary URLs, 'https://ttraff.ru/pify?keyword=adverbios+de+cantidad+en+frances+ejercicios+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the intended destination.

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=adverbios+de+cantidad+en+frances+ejercicios+pdf
    • http://files.rubysresidences.com/uploads/1/3/0/8/130874394/toloxi-piruv.pdf
    • http://rozer.allgirlsstemsociety.org/uploads/1/3/2/6/132696030/2815535.pdf
    • http://files.theenglishegg.com/uploads/1/3/0/7/130739214/dd86778a7593b54.pdf
    • https://cdn.shopify.com/s/files/1/0429/2424/5155/files/comfort_zone_heaters_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/73292963873.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/gotovojabekoje.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/68561305536.pdf
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/jimujuwarozegu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3839/8869/files/chaucer_canterbury_tales_middle_english.pdf
    • https://cdn.shopify.com/s/files/1/0432/8387/3942/files/30906496459.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70934180934.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31688109027.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/73271589299.pdf
    • https://cdn.shopify.com/s/files/1/0430/7641/9744/files/34791360371.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5494/files/kawaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/7691/9200/files/applied_psychology_in_human_resource_management_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/0553/4620/files/casio_fx-_9750gii_manual.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_off00006989.bin
1ba3e41d27d5475df2168b7f38d8d71bbdce3677325f091f77306925bcef31d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6989 5384 bytes
font_01_sfnt_off00007be5.bin
9ee4d4923364efe8730c2188f07ae2bad04b5cfc45bc679e789a5fe7f220a61b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE5 11296 bytes

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