Malicious PDF — malware analysis report

Static analysis result for SHA-256 8848e35169121091…

MALICIOUS

PDF

39.1 KB Created: 2020-08-01 13:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 80b0c66a719180572773bea4516fbeea SHA-1: 37ca12777f5bb6a9de0a774c17b37818df23d270 SHA-256: 8848e35169121091036e458866724e7e5eb4050859e0605824389bbe6b536dc0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One prominent link directs to a malicious redirector URL, 'https://ttraff.cc/pify?keyword=kenmore+washer+manual', disguised as a manual search result. This suggests the primary purpose is to lure users to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=kenmore+washer+manual
    • http://files.dreamplanitevents.com/uploads/1/3/0/7/130775280/rekadamamojobi.pdf
    • http://files.englishlizard.com/uploads/1/3/2/6/132682655/02179ac7a.pdf
    • http://files.oectrading.co.za/uploads/1/3/0/7/130776745/vifijipukoribo-sefojerumuko-daxufifok-vigekumofof.pdf
    • http://files.mwf-ec2019.com/uploads/1/3/2/7/132712358/komewubadoxo.pdf
    • http://files.sondrineleebontemps.com/uploads/1/3/2/7/132741322/7824136.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/tasaxipopupadanoxowu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6505/files/dologabanugodewip.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/kojowevor.pdf
    • https://cdn.shopify.com/s/files/1/0429/3846/6467/files/dajatix.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/zeriletasikogevofawi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0014/files/42410846827.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/jozibogu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/vikobatajimevuzije.pdf
    • https://cdn.shopify.com/s/files/1/0430/3391/9645/files/43307939519.pdf
    • https://cdn.shopify.com/s/files/1/0441/3331/8808/files/5256729662.pdf
    • https://cdn.shopify.com/s/files/1/0437/8660/0609/files/31338351369.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9240/files/40945689316.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d00.bin
da2d2f2e3d0d2191a10322d53f8f7bdf5926837ebb30beed1f418693f955a715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D00 4984 bytes
font_01_sfnt_off00006dd9.bin
80644455169d97c16598194a9a2411e8fed43ddf09a8ab2c3414d05bb7729630		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD9 9964 bytes

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