Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7137f8bd7f8737…

MALICIOUS

PDF

49.6 KB Created: 2020-08-03 03:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96ebeccc435ab92d8a081e148f5f4510 SHA-1: 5a552bf16552308f980364edf7153c35c82a88fd SHA-256: 9f7137f8bd7f8737d4052fc1f5b5f1c520333fd2aeede833a0c5c4538a136d3f
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that points to a redirector, which is likely used to obscure the final malicious destination. The presence of numerous links to external PDFs, many hosted on seemingly unrelated domains, suggests a link farm designed to manipulate search engine results or distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=tyranids+painting+guide+pdf
    • http://files.pandeliascanaryyellowcompany.com/uploads/1/3/0/8/130874583/mepapedamokupajufum.pdf
    • http://files.eccai.ca/uploads/1/3/1/8/131856134/lomukiretul-tujiwonuwenirez-sugenuzesakow.pdf
    • http://files.bhpcd.org/uploads/1/3/1/4/131406827/918244.pdf
    • http://files.julieannsfashionboutique.com/uploads/1/3/0/8/130814390/nemidume_jozilaresalav_munibuzomoriw.pdf
    • http://files.jadeblackmore.com/uploads/1/3/2/6/132695694/380da5237.pdf
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/fixupadadejoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/1538/9855/files/wazutegom.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/quando_quando_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/lazixazuxobelebilu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/kolipenefuxagixudinixotem.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/vetesuxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/simozajajatani.pdf
    • https://cdn.shopify.com/s/files/1/0432/1076/8546/files/mavuwulanowowuxuvap.pdf
    • https://cdn.shopify.com/s/files/1/0431/9631/7845/files/67950512633.pdf
    • https://cdn.shopify.com/s/files/1/0436/4576/3744/files/89001971308.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/defaweguzajilobiw.pdf
    • https://cdn.shopify.com/s/files/1/0434/8257/9110/files/66518594061.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/52778558162.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_off00007564.bin
8df502c40ad00590f974230baf60fc16428b9a508d9a726f3feaadc3b00c2b28
pdf-font-stream PDF embedded font (sfnt) at offset 0x7564 5000 bytes
font_01_sfnt_off00008674.bin
0944b6622ea013edcd95299190bdbbe58c843a23c778c11865efa56c77e255ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x8674 10804 bytes
font_02_sfnt_off0000ab7c.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB7C 4324 bytes