Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea41b732835e8d5…

MALICIOUS

PDF

46.1 KB Created: 2020-09-12 02:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 23381553807bbf529d2a2a8a0cd41b42 SHA-1: 16e75d7b7b9a673ec205c5e99c28b551480145ea SHA-256: 1ea41b732835e8d5f35bae33ff2b3f4303ad0b429b56a1d0277b5b0a06b3b4fb
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Adventure quest leveling guide' and the malicious URL, suggesting a lure for users. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to distribute the malicious payload. 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.me/wix?keyword=adventure+quest+leveling+guide
    • http://ligase.discoverwithdiana.com/uploads/1/3/0/7/130776023/bapodu_miwaze.pdf
    • http://dabetupa.risechildrenschoir.org/uploads/1/3/0/9/130968973/xebujufekerig.pdf
    • http://mutur.skincancerstreatment.com/uploads/1/3/1/4/131453780/wisoxunavupikukapaxi.pdf
    • http://luwexexog.saloneco.net/uploads/1/3/0/7/130739892/bijojafotiwujozuripi.pdf
    • http://files.westernheartsracing.com/uploads/1/3/1/4/131453588/9341068.pdf
    • https://static.usrfiles.com/ugd/04e6f9_debc162dae394ef2b0d6060316407524.pdf
    • https://static.usrfiles.com/ugd/eb6c48_9e360d79cff6437890b29622098d621c.pdf
    • https://static.usrfiles.com/ugd/b42fd6_fd88f471b928433cb83cb92d755ca32e.pdf
    • https://static.usrfiles.com/ugd/d9e9a0_66ccd282e4f948bd98e78415e4e6275e.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62222626122.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/fopanafanopizariguv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2750/4024/files/60134685635.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/14294702371.pdf
    • https://cdn.shopify.com/s/files/1/0437/4115/1386/files/best_ps4_emulator_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0438/5269/3654/files/64593147554.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_off000069d5.bin
71e02d9242e4d9d284b5e314208854a306106626f98138aa49b28d1d944f883d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D5 4728 bytes
font_01_sfnt_off000079e7.bin
90c29fc2c67ae7febdb4860da4c98b9b15f76866b8350b570041db242471030f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79E7 10296 bytes
font_02_sfnt_off00009cff.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CFF 4324 bytes

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