Malicious PDF — malware analysis report

Static analysis result for SHA-256 4576e28fcad90992…

MALICIOUS

PDF

44.2 KB Created: 2020-08-15 10:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d714c13ea6ecb35b7ba2d30e176166c SHA-1: f8f0ab042c954e499e7353b64b66694e8323a1aa SHA-256: 4576e28fcad9099295a4b7d24c9b838ea00424089167f1f307e263b5fcd7af61
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to manipulate search engine results, leading to a malicious redirector. The primary malicious URL identified is https://ttraff.ru/wb?keyword=windows%20interview%20questions%20and%20answers%20pdf%20download. This URL is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily corrupted, contains references to interview questions and the malicious URL, reinforcing the lure.

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/wb?keyword=windows%20interview%20questions%20and%20answers%20pdf%20download
    • http://pidazusej.huguenot-church.org/uploads/1/3/2/6/132695569/07164.pdf
    • http://files.fishermansantiago.com/uploads/1/3/2/6/132681579/5674197.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/88099813570.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/mopobipaduzuso.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/50172401753.pdf
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/sisamem.pdf
    • https://cdn.shopify.com/s/files/1/0448/0227/7542/files/pedejasogutamoden.pdf
    • https://cdn.shopify.com/s/files/1/0431/7508/4193/files/13483261188.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/64573469577.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/sjogren_s_syndrome_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/7090/6780/files/26244404801.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0673/files/horntail_guide_maplelegends.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/91359455585.pdf
    • https://cdn.shopify.com/s/files/1/0440/2829/7381/files/78340915065.pdf
    • https://cdn.shopify.com/s/files/1/0427/5830/8006/files/fundamentals_of_physics_7th_edition_solutions.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006182.bin
fa82863b4622bb2519096809204fa15a249f9350e3b6cac409508c5399e6ecca
pdf-font-stream PDF embedded font (sfnt) at offset 0x6182 5208 bytes
font_01_sfnt_off0000735a.bin
e97c2c1b909a1cc33a806a34632112d8958a333ca2c6c6e7ab2860d0161fcae5
pdf-font-stream PDF embedded font (sfnt) at offset 0x735A 9996 bytes
font_02_sfnt_off00009588.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9588 4324 bytes