Malicious PDF — malware analysis report

Static analysis result for SHA-256 d39bf1b03af82e0b…

MALICIOUS

PDF

61.4 KB Created: 2020-08-31 06:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c06a747fe09f51a595fda22a88dc371 SHA-1: 914854876019bd2d5e167844348a7dc4f1f08e6e SHA-256: d39bf1b03af82e0b7d386720de9b20fe174fec31cbd7ef992fa96dee54b2355f
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one heuristic specifically flagging it as a malicious redirector link. The document body, though heavily obfuscated, contains the same malicious URL found in the heuristics. The presence of numerous links suggests an attempt to manipulate search engine results or redirect users to potentially harmful content.

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.cc/wix?keyword=libro+de+los+muertos+egipcio+pdf+gra
    • https://static.usrfiles.com/ugd/b8c837_56b12172fd954cb7be43318321bb1f0c.pdf
    • https://static.usrfiles.com/ugd/c1de29_2e5146fafef64196bbbdea040353a23f.pdf
    • https://static.usrfiles.com/ugd/ae059d_6fe68a88314f4c74924fd9607cc8b4f7.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_0cbb829218454b9589d726e3a40d3ae3.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/jelekoxusuteki.pdf
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/freeletics_bodyweight.pdf
    • https://cdn.shopify.com/s/files/1/0437/9718/4673/files/fox_17_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0437/5756/8151/files/how_to_recover_password.pdf
    • https://static.usrfiles.com/ugd/aef5b7_a60baa9d59904df3b66d90642aabdb2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_b24f09a0afc94eb8a3a36743a3374409.pdf
    • https://static.usrfiles.com/ugd/b8c837_97715f0395ef4dd58396046bfa7ab6f4.pdf
    • https://static.usrfiles.com/ugd/0c268c_4120f234fdd7460380479865fe341cf7.pdf
    • https://static.usrfiles.com/ugd/a2d007_634b55f8026b4964a8e69e6dcf2bfad5.pdf
    • https://static.usrfiles.com/ugd/b8c837_663a55f8981a44bc82b73d35778bb442.pdf
    • https://static.usrfiles.com/ugd/735189_b939d6057196494ab2bdc7104291c47c.pdf
    • https://static.usrfiles.com/ugd/b8c837_eeb644a8260646139682e89063430a1d.pdf
    • https://static.usrfiles.com/ugd/5899d5_44a5285564104cef977cb99796995604.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_off0000aff3.bin
04d82379ac50324fddd19aaa052e53ce9f0372a6d6c9799b22a3136376db0be3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF3 5556 bytes
font_01_sfnt_off0000c2bb.bin
db49440084a8d136748b7141c3ec8a41d5cb95c90ac9541e72a7fc610c83dc59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BB 10920 bytes

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