Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc6c57003843b87e…

MALICIOUS

PDF

35.9 KB Created: 2020-08-10 16:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69177c9bbc7b9a577236c0a2af88d9c2 SHA-1: 5170df2e10c60a0c61b1e8794ab13fa5c82a2b46 SHA-256: bc6c57003843b87eb6b2dcaf2e2e5422cf3f91df0207d86f393101fba7fb698f
120 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a large number of external PDF links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=numerical+methods+and+statistical+techniques+using+c+pdf. The document body contains obfuscated text and numerous URLs, reinforcing the finding of a link farm designed to lure users to potentially harmful sites.

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=numerical+methods+and+statistical+techniques+using+c+pdf
    • http://files.kwikwashlaundromat.com/uploads/1/3/0/7/130739116/7469494.pdf
    • http://files.gloryb2g.com/uploads/1/3/1/3/131398251/toroxef_zipuveduzovo.pdf
    • http://files.fatherkeyes.com/uploads/1/3/0/8/130874379/narorip_kurimalidalava_kaxanuzeza_kivejowu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/fizevagexi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/38925412693.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/doxogolesutezo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3351/8489/files/extract_mp3_from_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0431/7049/6661/files/91523875442.pdf
    • https://cdn.shopify.com/s/files/1/0435/5263/7091/files/energies_renouvelables_au_maroc.pdf
    • https://cdn.shopify.com/s/files/1/0435/3284/5207/files/amazon_fire_7_tablet_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/21346002447.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/nuloxajusevudegonav.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/7547843358.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8469/files/25635777674.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_off00004c24.bin
a3ca7f23e0662382e2bb6a0ff65bb6a7d785fd41246feeb66f49b4e1d6c1155f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C24 5664 bytes
font_01_sfnt_off00005f38.bin
270b59e78c05e7fc91adc1ccffe37516f97570122ebd3444020aff804b8d775f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F38 10292 bytes

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