Malicious PDF — malware analysis report

Static analysis result for SHA-256 abff3b32ff4defc9…

MALICIOUS

PDF

47.0 KB Created: 2020-08-10 01:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab17671e427ba0119fce40e3e047dfc5 SHA-1: 211a4c86c6745c8d1490eb38468c13930b6545bb SHA-256: abff3b32ff4defc960e6b9f108ac0e006b1d60ef2790b0a9086a61222d10126f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is presented in the document body as a search result for 'algebra 1 textbook mcgraw hill pdf'. This indicates a phishing or social engineering attempt to direct users to malicious infrastructure. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=algebra+1+textbook+mcgraw+hill+pdf
    • http://setamaj.ivan-foto.com/uploads/1/3/1/0/131069839/loxawekumu-guwinob-diwisodufomam.pdf
    • http://gapemo.onceuponarockvermont.com/uploads/1/3/1/1/131163599/weruvunonepa.pdf
    • http://files.meeraramanibcba.net/uploads/1/3/0/8/130813528/13a52c7c.pdf
    • http://wavire.ericaabikaramphotography.com/uploads/1/3/0/8/130814535/0ab199a91.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/dante_aligijeri_boanstvena_komedija.pdf
    • https://cdn.shopify.com/s/files/1/0434/2333/4567/files/tekuniluziweka.pdf
    • https://cdn.shopify.com/s/files/1/0430/9899/6889/files/52375655110.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/wojotuxojomabubotupus.pdf
    • https://cdn.shopify.com/s/files/1/0435/4880/3227/files/albizia_adianthifolia.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/63835580323.pdf
    • https://cdn.shopify.com/s/files/1/0435/2226/1143/files/kojiwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5103/files/zevokowekabajadorura.pdf
    • https://cdn.shopify.com/s/files/1/0430/4060/4313/files/list_of_adjectives_a_to_z.pdf
    • https://cdn.shopify.com/s/files/1/0433/8712/5927/files/51900926052.pdf
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/hafele_kitchen_catalogue_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5509/4679/files/kepubifadadizijafusamir.pdf
    • https://cdn.shopify.com/s/files/1/0431/8461/9680/files/1952802213.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_off000068ff.bin
983f0417c5ac9c77a750810cb1951fef7b987eeacfef05e7b16770752d1b1b0b
pdf-font-stream PDF embedded font (sfnt) at offset 0x68FF 5480 bytes
font_01_sfnt_off00007bbc.bin
fe928ae4ebe9dc1a0a62b42d7b7c41bee43b51462bff8a6714e4885770e29e46
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBC 10800 bytes
font_02_sfnt_off0000a0af.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0AF 4324 bytes