Malicious PDF — malware analysis report

Static analysis result for SHA-256 a90b7ffa7d87e5db…

MALICIOUS

PDF

42.8 KB Created: 2020-08-18 13:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ec165bdb9eadbae98b1469bae21749c SHA-1: 710885aa0b1af7e7bd89fa66b277ccf7b8953ba1 SHA-256: a90b7ffa7d87e5dbf9778fe44f8ef95853e25c790efabc4ab023671726da1868
120 Risk Score

Malware Insights

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

The PDF contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to malicious infrastructure. The document body, though partially corrupted, contains text suggesting it is a 'Group project evaluation form for students' and includes the malicious URL. The PDF also exhibits characteristics of a PDF_SEO_LINK_FARM, with numerous embedded links, many pointing to Shopify domains, likely to obscure the malicious redirector.

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.cc/pify?keyword=group+project+evaluation+form+for+students
    • http://loxad.kangaroosatrisk.net/uploads/1/3/1/6/131607062/kedovijadar_pizep_dizufonuduze.pdf
    • http://nenixi.knewspace.org/uploads/1/3/0/9/130969264/jopexefalemusu_naforirixixeda_xiwapena_getepinirapera.pdf
    • http://files.thepmdgroup.net/uploads/1/3/1/3/131379246/1823556.pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5614/files/jetisokasuditovupugoteti.pdf
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/fojove.pdf
    • https://cdn.shopify.com/s/files/1/0429/5373/6348/files/autoestima_en_mujeres_maltratadas.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/88098339931.pdf
    • https://cdn.shopify.com/s/files/1/0434/0288/7322/files/mikodirigogifatipojosiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/4819/6506/files/cantos_infantiles_cortos.pdf
    • https://cdn.shopify.com/s/files/1/0437/2230/9786/files/introduction_to_environmental_engineering_mackenzie_davis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0996/6239/files/datumonu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/91642078575.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2089/files/rise_of_skywalker_putlocker.pdf
    • https://cdn.shopify.com/s/files/1/0428/5625/1555/files/67812380303.pdf
    • https://cdn.shopify.com/s/files/1/0431/6931/7020/files/lp_neoplasma_ovarium_kistik.pdf
    • https://cdn.shopify.com/s/files/1/0438/2018/7805/files/10376351890.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_off00006926.bin
ffcceab25831f40faa93907307ac60f2dc1f2790069c91ba444d1dfeb1cb723e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6926 5468 bytes
font_01_sfnt_off00007bba.bin
ae90b44b2744c1870b81a4f9d7b68c2abe1d61bc70340e9cdaa2b9a2b99883e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBA 10084 bytes