Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c72569bdef65049…

MALICIOUS

PDF

57.2 KB Created: 2020-08-02 17:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec22328cc485fc57880b3f2b908b507b SHA-1: e382b0fd178ecc2c5065dcb0b1aea519edddff1a SHA-256: 3c72569bdef6504944e551d7d6402c056e33a8a36c11e595b37391a9614c7cc2
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, forming a link farm. One of the primary links, https://ttraff.cc/pify?keyword=javascript+fetch+post, is identified as a malicious redirector. This suggests the document's purpose is to lure users to malicious sites through this link farm. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious redirector and the link farm structure strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=javascript+fetch+post
    • http://files.crossfitsouthforney.com/uploads/1/3/1/3/131384436/kutatakokoku-sagoxesip-notod.pdf
    • http://files.bakedbyromanos.co.uk/uploads/1/3/1/4/131406390/b4204a97.pdf
    • http://files.southernblvdsigns.com/uploads/1/3/1/8/131871902/7062235.pdf
    • http://files.functionalhealthcoach.com.au/uploads/1/3/1/8/131856547/6793874.pdf
    • http://files.makerseclectic.com/uploads/1/3/2/3/132302982/9e0101b6130499d.pdf
    • https://cdn.shopify.com/s/files/1/0428/9282/0643/files/sixadatolugijefinapizu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/laribimewobawekobajugami.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0426/files/abrogator_stone_farm.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6015/files/18797288313.pdf
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/53616740928.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/88999702534.pdf
    • https://cdn.shopify.com/s/files/1/0437/8011/2535/files/86798289457.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/wajixone.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/global_variables_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/53703885283.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3330/files/vewalumotozexilemukis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovaratumu.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000651b.bin
17b090460f3ab3363c5b7cb275ec5a8e745ead906a9ac9c2522c8af0ab019616		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651B 4800 bytes
font_01_sfnt_off00007577.bin
a085dd2db8ec6f0d5e8e3a82ba2d025b04522c634a9e0cb47d4e6dc3228ecc85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7577 2512 bytes
font_02_sfnt_off00008062.bin
25f88d4cbc7a789f652a9a71efd1fd1f37e0885f33295c839904a1ecadd8559d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8062 14924 bytes
font_03_sfnt_off0000b02e.bin
dad064d3c492be17d628d8bf5302659c041d632eb1537ace3dd1861f15859007		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB02E 17236 bytes
font_04_sfnt_off0000c913.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC913 4324 bytes

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