Malicious PDF — malware analysis report

Static analysis result for SHA-256 a045b2eff76eb9ad…

MALICIOUS

PDF

45.3 KB Created: 2020-08-03 11:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e4fc91b6eca7457091d7ba1d70bc7ed SHA-1: 3ff410c1018d8bf864478cfd201ecced5c6468a2 SHA-256: a045b2eff76eb9ad537b1343b36d57dcf83b184205790372b04aec88b036bd03
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO poisoning. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is presented as a download for 'b d chaurasia general anatomy pdf download'. This indicates a phishing or scam attempt to redirect users to malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=b+d+chaurasia+general+anatomy+pdf+download
    • http://files.shiragirlschoir.org/uploads/1/3/2/6/132681438/b19819daffed.pdf
    • http://files.rhwa.org/uploads/1/3/2/8/132814544/giwofoxupir.pdf
    • http://files.greenwaymetalrecycling.com/uploads/1/3/2/6/132695343/fituwurub.pdf
    • http://files.manhattanhope.com/uploads/1/3/1/6/131637291/vepojukuse_javiguxobe_nuvuv_sodudixi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/c_string_to_int.pdf
    • https://cdn.shopify.com/s/files/1/0439/5833/7694/files/the_crucible_ddo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/zokutumaxibodiziduludog.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/59637371930.pdf
    • https://cdn.shopify.com/s/files/1/0432/3613/0983/files/moparupizirumolifavage.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/51090278328.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/xagifefubogiseregi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/david_deangelo_double_your_dating.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/download_from_xnxx.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/jukesa.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_off000064a1.bin
42a84176eba3b6ea37d7860805daae49ae699d1c43655899b883e52e1850de31
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A1 5696 bytes
font_01_sfnt_off000077e5.bin
145f2006c4bfd3964fb3620dbeaef16349a096a8d34d6e89fd9cfe3f9df57737
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E5 9960 bytes
font_02_sfnt_off00009a00.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A00 4324 bytes