Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e44ad9bafec7e01…

MALICIOUS

PDF

41.6 KB Created: 2020-08-23 18:45:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b9cff440e081d4f07ea6527bfc22c0f SHA-1: d41795920b279d73484f891b05bfdacd51c97d0c SHA-256: 9e44ad9bafec7e01a1c6cdb2e78287aa77b0d95365d1036613b67a9fcdd35b60
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary URL pointing to a redirector service. This suggests a phishing or spam campaign aiming to direct users to malicious content through obfuscated links. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=index+berlin+art+guide
    • http://files.jorn.com/uploads/1/3/1/0/131070434/6916466.pdf
    • http://zorumot.yrpm.ca/uploads/1/3/0/7/130775565/763de2.pdf
    • http://www.indexberlin.de/
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/53524171264.pdf
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/charlie_puth_song_attention.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12584167006.pdf
    • https://cdn.shopify.com/s/files/1/0438/4771/2928/files/gepazanabesituson.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/39834067849.pdf
    • https://cdn.shopify.com/s/files/1/0434/5665/9621/files/xosevibutuxasusoporuwul.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/vumipadudujunaregexaz.pdf
    • https://cdn.shopify.com/s/files/1/0462/2611/2666/files/87282199039.pdf
    • https://cdn.shopify.com/s/files/1/0432/9567/0427/files/escala_braden_q.pdf
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/xonamewesi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1288/files/an_enthusiastic_gilled_blob_is_on_screen.pdf
    • https://cdn.shopify.com/s/files/1/0440/5349/5958/files/22407458127.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_off00006477.bin
8cd1200d5c0ae39f1b5e7b9772b631823643efb5d65df47fd77d07d5bfdca0c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6477 4960 bytes
font_01_sfnt_off0000755a.bin
48f1a0bb68a4a0836d0ab3fcd89d0f97ecfb0cdc65cfd895a746582b9207affc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x755A 10728 bytes

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