Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ccf19f64e73890…

MALICIOUS

PDF

45.6 KB Created: 2020-08-30 14:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 833ca2c7bb799a5034c743d976d56551 SHA-1: 5f6f0513c9dda6723ce89e247eb0e6f9f6e7a0bf SHA-256: e8ccf19f64e73890f7ab84870a9f796c15cc67a196b72016d834c668c9af7fb2
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and link farming. One of these links, disguised as a download for 'The artist's guide to sketching', points to a known malicious redirector. The document body, though heavily obfuscated, contains the same lure text and the malicious URL, indicating the primary intent is to trick the user into visiting the 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/wix?keyword=the+artist%2527s+guide+to+sketching+download
    • https://cdn.shopify.com/s/files/1/0435/5247/3252/files/pusob.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/organize_excel_spreadsheet_alphabetically.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6152/files/mapebefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/86418250137.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/antenatal_care_green_top_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0431/5709/4551/files/lagu_nazia_marwiana_terdiam_sepi_metrolagu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6359/files/livinikuloworigiwirivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3320/6689/files/certificate_of_incorporation_definition.pdf
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/chilton_repair_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/vudewiregipiborewajezow.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/thomas_calculus_matematik_1_trke.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/mexew.pdf
    • https://cdn.shopify.com/s/files/1/0434/2326/9014/files/17561623981.pdf
    • https://static.usrfiles.com/ugd/b8c837_649517d3e2b14ba1816d4229783b3e13.pdf
    • https://static.usrfiles.com/ugd/b8c837_8731ca8a8b6c45afb1c21e8d644fb998.pdf
    • https://static.usrfiles.com/ugd/cd79e3_c678c8015fb94e61b5993ad7bac4830f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fcee2258a4d418ea635d4094cd36c73.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_off000072f7.bin
a43b2025853cb9144289814dd1b1595e6b299e9e92b847eb4584dc7a1d6e57ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x72F7 5340 bytes
font_01_sfnt_off00008530.bin
89bac3071a8c9aa67252d15f6da6125fbc74dec79d8f25df75868a81456d6a31
pdf-font-stream PDF embedded font (sfnt) at offset 0x8530 10684 bytes