Malicious PDF — malware analysis report

Static analysis result for SHA-256 40014c02068061fd…

MALICIOUS

PDF

39.5 KB Created: 2020-07-26 21:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3129f828bc6733dd8148e96cb875945 SHA-1: 1395a6acecedbb360f6bd682f845bf8ea61f60b6 SHA-256: 40014c02068061fdbdf88844d4e438e1ac13c403733e898414cae776a465a75c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, appears to contain metadata related to a service manual, potentially used as a lure. The presence of a malicious redirector suggests the document is designed to lead users to a harmful external resource.

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/wb?keyword=fender%20frontman%2065r%20service%20manual
    • http://files.textileretreats.com.au/uploads/1/3/0/8/130814830/belar.pdf
    • http://files.paulelliottbooks.com/uploads/1/3/1/6/131606073/wilapobekumofu-pexedilama-selekodabatal-kagesosuxosomev.pdf
    • http://files.aspoonfulsparkle.com/uploads/1/3/1/6/131637658/7591832b.pdf
    • http://files.selkicasarpg.com/uploads/1/3/1/6/131637057/8beeecc57.pdf
    • http://files.glenburniequicktaxi.com/uploads/1/3/0/7/130776413/zisivunu_pubifiz.pdf
    • http://files.asp
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/nodowujaga.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/58658770063.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/45047575854.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/sutedokiluzalatomekatexez.pdf
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/joreketebovana.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4820/files/28902447582.pdf
    • https://cdn.shopify.com/s/files/1/0431/7623/1063/files/85593616822.pdf
    • https://cdn.shopify.com/s/files/1/0438/3630/9666/files/43855528656.pdf
    • https://cdn.shopify.com/s/files/1/0435/4061/1226/files/vamosudumepa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/xegopesa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/82092973356.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/24005064645.pdf
    • https://cdn.shopify.com/s/files/1/0436/8039/9513/files/tevililizoneg.pdf
    • https://cdn.shopify.com/s/files/1/0428/5205/7244/files/satugudud.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_off00005b87.bin
2faaacba7f5e7bd58189a75081045bf6dc3d098910b239b8654d6931e883328e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B87 5344 bytes
font_01_sfnt_off00006d9f.bin
8299b9da50af55d51258064f8825c1dd7610038ac114b75ed5de737968862661		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9F 10260 bytes

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