Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2b9b99110eb90d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-20 07:26:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e220631218d11014ecac238df321c52 SHA-1: 88131f2448117104e87bcf5ad8c79b9da301a34b SHA-256: db2b9b99110eb90d05ebbc75195328a6590b0e1ef1df66b082c5c82858ad234d
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised with text suggesting it is a math book answer key. This indicates a phishing or social engineering attempt to redirect the user to malicious infrastructure. The PDF also contains a large number of external links, many of which point to Shopify domains, suggesting a link farm or SEO manipulation tactic 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.com/pify?keyword=go+math+book+answer+key
    • http://files.jenniferchapin.net/uploads/1/3/1/3/131380687/1826936.pdf
    • http://xifagoki.rootedimaginings.com/uploads/1/3/0/7/130739616/3500121.pdf
    • http://files.juliemorganbooks.com/uploads/1/3/2/8/132815220/riseg-lijuf-legagujedazis-dokapagido.pdf
    • http://files.houstoncremm.com/uploads/1/3/1/4/131437493/00f0bf868.pdf
    • http://files.akarchitecturestudio.com/uploads/1/3/0/7/130776110/sejovudimamuxutasabi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0540/0472/files/cancer_de_piel_diagnostico_y_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/40_day_love_dare_for_parents.pdf
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/zoom_banyai.pdf
    • https://cdn.shopify.com/s/files/1/0428/7932/0220/files/hexaware_technologies_placement_papers_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/0564/8807/files/joxizorixusax.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3654/files/xididoseje.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/gawopu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/lonexegifabelebixetafe.pdf
    • https://cdn.shopify.com/s/files/1/0430/3178/9721/files/peludugevevupinodipebobep.pdf
    • https://cdn.shopify.com/s/files/1/0448/1817/0018/files/68856969076.pdf
    • https://cdn.shopify.com/s/files/1/0430/0744/3103/files/fatufuda.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_off00006299.bin
ee35bde5779b801986d6c00400496c3a3948148e8d9a6d77231ef50d8553215b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6299 5320 bytes
font_01_sfnt_off000074a1.bin
bc3304cf0ec43cc84c4bd418e31a1cbe24e2aacd26e82d11bd7019dd1359ea1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A1 10748 bytes

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