Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98c8a598ab201ff…

MALICIOUS

PDF

45.8 KB Created: 2020-08-23 01:17:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cb4cdf1f703f86190e0167ab500b2d5 SHA-1: 0686beac7b3c864560624b42d1d382bfac8a6c5e SHA-256: e98c8a598ab201ff639b2cb0c6fb63379c65f8c13c78b68f6b7d9c2856f5f76b
128 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.cc. The presence of a 'download button' lure further suggests an intent to trick the user into clicking the malicious link. The document body is heavily obfuscated but contains the malicious redirector URL.

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.cc/pify?keyword=multisim+circuit+simulator
    • http://files.polyq.org/uploads/1/3/0/9/130969297/buzosimofe_titusilusixan_liwuso_wuvexak.pdf
    • http://files.generalpencil.com/uploads/1/3/1/4/131483147/lavatagatejoni_lusefu_wowopolipukufi.pdf
    • http://files.spogafc.com/uploads/1/3/0/8/130813654/jirutu-nigogilotu-dijivuzutopud-nobaduxiwuw.pdf
    • http://files.ninecriticalmonths.com/uploads/1/3/0/7/130775126/b0084f8.pdf
    • https://cdn.shopify.com/s/files/1/0431/1983/7346/files/suzavunosu.pdf
    • https://cdn.shopify.com/s/files/1/0454/7267/8054/files/carbon_clean_dcs-_16.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9024/files/wexavid.pdf
    • https://cdn.shopify.com/s/files/1/0431/7285/5957/files/wizard101_mvp_v0._3.pdf
    • https://cdn.shopify.com/s/files/1/0449/7974/9022/files/air_waybill_sample.pdf
    • https://cdn.shopify.com/s/files/1/0434/3165/7638/files/pifilabatidupel.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/11647451729.pdf
    • https://cdn.shopify.com/s/files/1/0437/1434/7160/files/77376601120.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/castelnuovo_tedesco_capriccio_diabolico.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/2476282035.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/12155771431.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_off0000779a.bin
6384423d0a1edaf5c976c0ce32f57ab7c57c0b80e56a836cb8abf89064127560
pdf-font-stream PDF embedded font (sfnt) at offset 0x779A 4952 bytes
font_01_sfnt_off00008852.bin
5a729de18f068c8e2c447880e09204bb8dda4904b0fe91b0676f43c17612c6ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x8852 10060 bytes