Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e1bb72c7107f72…

MALICIOUS

PDF

63.0 KB Created: 2020-08-12 21:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 581765e560724ea0c79cb890029feef0 SHA-1: 0d52e07416b661df9af070165f2a128ab8c31f35 SHA-256: 89e1bb72c7107f72540cbe1e9dd96a465b70e1aef32e34b73178680375f025ad
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body text, though partially corrupted, includes the phrase 'Asme b31. 1 pdf free download' and a URL that appears to be a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The file is structured as a PDF with embedded links, suggesting a social engineering attack to trick users into downloading harmful files.

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/pify?keyword=asme+b31.+1+pdf+free+download
    • http://files.djswytch.com/uploads/1/3/1/8/131871405/fibixare.pdf
    • http://files.edsworldwide.org/uploads/1/3/2/7/132740320/sotilemiz-gukixedesimujar-bevulas-lativeponeji.pdf
    • http://files.agilitydreammaker.com/uploads/1/3/1/4/131438330/jenelobawatevoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/58680770393.pdf
    • https://cdn.shopify.com/s/files/1/0432/2210/6271/files/42142211070.pdf
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/8121872287.pdf
    • https://cdn.shopify.com/s/files/1/0430/9545/7941/files/zajojeforevepoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/8602/0761/files/25176381557.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3990/files/lowes_cagan_crossing.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3943/files/wiwojegu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6786/6265/files/81532694028.pdf
    • https://cdn.shopify.com/s/files/1/0438/9103/2216/files/93859651252.pdf
    • https://cdn.shopify.com/s/files/1/0430/7258/5888/files/71729476561.pdf
    • https://cdn.shopify.com/s/files/1/0438/2579/1138/files/final_fantasy_6_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/telecharger_bescherelle_grammaire_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/41630349667.pdf
    • https://cdn.shopify.com/s/files/1/0432/0650/8701/files/jeser.pdf
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/xaruz.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_off0000aa26.bin
71e39573ab68a0bf4031751081f560815669790a42d4316270a7a07695803359
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA26 5656 bytes
font_01_sfnt_off0000bd57.bin
8ba28e74eea20d1d91aa5ebe5ac346be9e70c2adccb1e527647090cec90e1570
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD57 16128 bytes