Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c52eb373bb77467…

MALICIOUS

PDF

41.5 KB Created: 2020-08-02 07:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c73358708e8bf8242c5e248cc2c73dcc SHA-1: dfe9b5462b51137879b7f41723c0ad0a20d78a91 SHA-256: 2c52eb373bb774670f32bd523aaa08ea4fd28e6e563d6b93db05dc65f2105a69
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, with a critical heuristic firing indicating a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=whiskey+lullaby+chords. The document body contains garbled text along with the primary malicious URL and several other URLs hosted on cdn.shopify.com and various other domains, suggesting a phishing or redirection campaign. No scripts were extracted from this sample.

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=whiskey+lullaby+chords
    • http://files.atonewellness.com/uploads/1/3/1/3/131383398/gananikukikadu.pdf
    • http://files.noahbearproduction.com/uploads/1/3/1/0/131070313/mojolunifenewu.pdf
    • http://files.tinglerart.com/uploads/1/3/1/3/131378993/migikugowus-puxesegutowipe.pdf
    • http://files.lemieuxchihuahuas.com/uploads/1/3/1/3/131383456/jonatawisuge_bonagusodeziju_vopagagodas.pdf
    • http://files.onpointsharp.com/uploads/1/3/0/8/130874110/5084833.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/vemogifawesomi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/xolipumobilote.pdf
    • https://cdn.shopify.com/s/files/1/0435/2950/2874/files/75640287823.pdf
    • https://cdn.shopify.com/s/files/1/0437/7922/7810/files/46194443778.pdf
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/dungeons_and_dragons_3._5_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/bumurufobed.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3747/files/49330332656.pdf
    • https://cdn.shopify.com/s/files/1/0435/7931/0239/files/usb_read_only.pdf
    • https://cdn.shopify.com/s/files/1/0429/8624/2209/files/dugalide.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/25136788143.pdf
    • https://cdn.shopify.com/s/files/1/0432/5271/1581/files/66674161696.pdf
    • https://cdn.shopify.com/s/files/1/0432/2797/1741/files/vatijigejowuderutininav.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/jaan_tery_naam.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_off00004eca.bin
a005b84f9fcecef84baa3a788dc5ede8b96f5bc615ba3b65a29ddc6afdbd23e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ECA 5040 bytes
font_01_sfnt_off00005ff7.bin
b6828b1d522153674dda8fb08019991a96da468ba1231debe1b7ed76282822e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF7 13396 bytes
font_02_sfnt_off00008909.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8909 4324 bytes

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