Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9e947f9092f46a…

MALICIOUS

PDF

47.9 KB Created: 2020-07-28 23:02:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff32fdefc70534b14d6d5652f246b920 SHA-1: a5f2b1f63378b1cd475ac1127bf1bd18242de522 SHA-256: 4b9e947f9092f46a5865c7b2bb7cd99f31f5f883dfb812fcc18f43b7ce8e7647
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector link. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=antibiograma+pdf+2016', which is likely used to redirect users to further malicious content. Another heuristic identified a PDF link farm, suggesting a broad attempt to distribute malicious links.

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=antibiograma+pdf+2016
    • http://files.burgerclubdubai.org/uploads/1/3/1/3/131379803/6877080.pdf
    • http://files.111sage.com/uploads/1/3/1/0/131070469/48e077f6f4679c.pdf
    • http://files.get2steeping.com/uploads/1/3/0/7/130739782/vipedofijujugeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85755015361.pdf
    • https://cdn.shopify.com/s/files/1/0435/1895/1576/files/49120570631.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/podununoxisobigetinod.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6505/files/96096184891.pdf
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/gemesamigatar.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/79360201011.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/vedajozizukimogufuxorosi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7473/1685/files/wovirenajifeneri.pdf
    • https://cdn.shopify.com/s/files/1/0432/3852/3047/files/pukexil.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/38584994093.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/56587197160.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_off00007a49.bin
0124644ab3b6d0899974e90fd05157dde97e272c3d8199826c8e98265d0a3d6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A49 5428 bytes
font_01_sfnt_off00008c99.bin
9e6ee860680404441611b5f6471eb7d3d05bad9fdc9a81b8e6eff1f99891e162		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C99 11360 bytes

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