Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f04c30437b169b3…

MALICIOUS

PDF

60.9 KB Created: 2020-08-15 18:37:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d69f8e558e0da6e4fb4de7e762404145 SHA-1: af6d64ef222fe1ba97222b90407cf5a616c9b43d SHA-256: 4f04c30437b169b3299fc2ed41d6bed56c11d66e50f517010ce2be6d273c10a0
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that is also present in the malicious redirector link, suggesting a lure to download further content. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful sites.

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=yasin+suresi+meali+pdf
    • http://files.dockconnectionllc.com/uploads/1/3/0/9/130969548/697a6.pdf
    • http://jejol.gwrraohioc3.org/uploads/1/3/1/6/131606069/0ed5c49849.pdf
    • http://sevalon.midwestmulticulturalassociation.org/uploads/1/3/1/0/131070571/zisiwaxulu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2799/6565/files/wapavorojezajesafive.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/60645660334.pdf
    • https://cdn.shopify.com/s/files/1/0438/3650/6272/files/skyrim_better_vampires.pdf
    • https://cdn.shopify.com/s/files/1/0430/2811/9706/files/linimavakelidijonezudera.pdf
    • https://cdn.shopify.com/s/files/1/0439/1347/8312/files/juvof.pdf
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/gelix.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/24064353386.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/95934867851.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/liste_suffixes_franais.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/1824046893.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
stream_006_off0000abca.bin
ec8bc39ca10ab8dfc4a0de848549c6bb67060ae57e1352ef69037c950c65b153		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xABCA 24096 bytes
font_00_sfnt_off00006ff5.bin
ba38594799608a4d4ba89913bf4786dd5563c57589347604b79f1d562b61b5ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF5 1636 bytes
font_01_sfnt_off00007831.bin
5cae3649d3afcd24528d776d609a3f7d2d1f89b85c8d68d623205b6c4d629aab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7831 4840 bytes
font_02_sfnt_off00008871.bin
681292e3719ae17fa94080e38986721f036aba99318f7ad751488767a9e813fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8871 10660 bytes
font_04_sfnt_off0000d7ee.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EE 4324 bytes

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