Malicious PDF — malware analysis report

Static analysis result for SHA-256 31896136c80f623d…

MALICIOUS

PDF

42.6 KB Created: 2020-08-17 16:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b49452026a503a215f359837e5a13bd9 SHA-1: dc73f03b1997826fa8d66fa69605860d75adcc14 SHA-256: 31896136c80f623d85a94a9c70ea92465bbbae0809d051f075973f2b7c471102
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to funnel victims to a malicious site. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'magnesium from seawater to fireworks answers'. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase the visibility of the malicious redirector. The ML classifier also strongly indicated maliciousness.

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=magnesium+from+seawater+to+fireworks+answers
    • http://files.pointepoa.org/uploads/1/3/2/6/132696483/kumirazowoga_momamedarofem_sumufiwedoresan_fatoxijupeziv.pdf
    • http://tisuba.gtqueens.com/uploads/1/3/0/8/130874050/zusuzajawejaj_tupenuseku_bamebewu_luvaxedamole.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/85447214822.pdf
    • https://cdn.shopify.com/s/files/1/0437/3217/2965/files/42296246059.pdf
    • https://cdn.shopify.com/s/files/1/0434/0052/8033/files/believe_in_yourself_you_are_amazing_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4823/files/vakosovuzunegaluzar.pdf
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/android_appcompat_v7_error.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4924/files/33468135495.pdf
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/x_ambassadors_love_songs_drug_songs.pdf
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/lotumegu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7507/5225/files/51129355329.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_off00005ad8.bin
5ae3a0e99f46e3e397f2952b0ee9a2f7760258ba5d9d0427cb6b0a7191c42bf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD8 5096 bytes
font_01_sfnt_off00006c2f.bin
77526b7cef2d7d0e68531732ccf879fcc166eceaeb4b7ea426a2253e13e121ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2F 10440 bytes
font_02_sfnt_off00008fbd.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBD 4324 bytes

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