Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb790d8d21911b48…

MALICIOUS

PDF

38.9 KB Created: 2020-08-14 21:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d788db1d2bcab9f5c6524ae6553da5e SHA-1: c6a4ab4c475d58237b7e2cc63848a33e6f1c9fe0 SHA-256: bb790d8d21911b48ed39ffabdba4b3d5157a4c5723e0c11b2606747ebcd362ca
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an 'Arriva bus app apk' download, which points to `https://ttraff.com/pify?keyword=arriva+bus+app+apk`. The document also hosts a large number of external PDF links, many of which are hosted on Shopify domains, suggesting a link farm for SEO manipulation or to obscure the true malicious destination. No scripts were extracted, but the presence of a malicious redirector and link farm indicates a phishing or social engineering attack.

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.com/pify?keyword=arriva+bus+app+apk
    • http://files.resolvecs.com/uploads/1/3/1/6/131606866/lovakugororabopazow.pdf
    • http://files.kingschapelashford.com/uploads/1/3/1/6/131606431/tixoruwilavom_gumazoxubinidel_fovipiw.pdf
    • http://files.brazil-yellow-virus.com/uploads/1/3/0/7/130775223/7818106.pdf
    • https://cdn.shopify.com/s/files/1/0431/6430/3522/files/dawuxakibox.pdf
    • https://cdn.shopify.com/s/files/1/0438/4977/7312/files/jirukesonimadurab.pdf
    • https://cdn.shopify.com/s/files/1/0436/5549/5833/files/tokomijolujugepajebokeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/1405/2247/files/beyond_the_aquila_rift_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0449/8548/3422/files/how_to_use_spotify_as_an_alarm.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6812/files/marketing_research_project.pdf
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/adding_subtracting_multiplying_and_dividing_integers_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4318/files/bronchiolite_cours.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_off00005cd2.bin
264636cb4f50898bb4ae1e10fb3517e7baab31d4ff2d8b0a6be0bd79de2c7afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD2 5032 bytes
font_01_sfnt_off00006e02.bin
ad58472eb5b38e6ccd71f30022de2e9ecc342bda748bfba0a51e277ea618be9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 9832 bytes

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