Malicious PDF — malware analysis report

Static analysis result for SHA-256 efa2a55b9130854d…

MALICIOUS

PDF

51.8 KB Created: 2020-08-17 16:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74f257b3cb058310cf44308be763fba3 SHA-1: 6d87424b58dfc531f6f6539b96cd132479d4e141 SHA-256: efa2a55b9130854db5c52cf9908c4bbc454874345a01567a044248cb353535de
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=fybsc+physics+practical+book+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. The primary intent appears to be directing users to malicious infrastructure under the guise of providing a physics book.

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=fybsc+physics+practical+book+pdf
    • http://solowojo.bluesoxshop.com/uploads/1/3/1/4/131409090/c88c989.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/73199236080.pdf
    • https://cdn.shopify.com/s/files/1/0437/9249/8850/files/88124042507.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/51947102904.pdf
    • https://cdn.shopify.com/s/files/1/0431/9579/3557/files/apc_back_ups_es_350_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4784/5021/files/causes_and_effects_of_the_great_depression.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/12050334973.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7073/files/16187359638.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/78795899425.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/vipulumibakatij.pdf
    • https://cdn.shopify.com/s/files/1/0447/7979/8679/files/los_ojos_verdes_gustavo_adolfo_becquer.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7253/files/53338807238.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/saints_row_3_character_creation.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/xopoveve.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fa1.bin
060491135fe78fac2fc8d69dae27bcac765a2a2a234486d2671ded227cae501c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA1 5504 bytes
font_01_sfnt_off0000724a.bin
3ec5eaebde275098412d8dff0e1045b52b4c0e5a23abac5807418a6329e69f43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x724A 3204 bytes
font_02_sfnt_off00007f3a.bin
026de1076dad6614fee7b4839f066e743e4238b5ddea94259138cfcd618330b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3A 2320 bytes
font_03_sfnt_off0000898c.bin
154f3504563847afd5238de1ae16a6e4786f5b67c360e71557d935218309bce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x898C 10180 bytes
font_04_sfnt_off0000ac19.bin
7a7e0f9cb89785dee93ecfbcc78ef93b5a18a5022886c2d5a0bf15d9412c15a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC19 16224 bytes

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