Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e00761f94e9d2f7…

MALICIOUS

PDF

60.1 KB Created: 2020-08-21 06:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e23dcb8497e990bfa3140d48b16c5f84 SHA-1: 977e55557168f42443671e74b30ba88718fd3699 SHA-256: 1e00761f94e9d2f73f44ca3d07e646ff1ef6b75ca1c9c6850e0bb4411276aa8c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly indicates maliciousness. The document body appears to be a garbled attempt to mimic search engine results for 'Malayalam child songs free', likely a lure to disguise the malicious redirector.

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=malayalam+child+songs+free
    • http://files.spartanburgrepertory.com/uploads/1/3/2/6/132681836/3615501.pdf
    • http://satup.powelloktoberfest.com/uploads/1/3/1/4/131408027/79629740c19c674.pdf
    • http://rerixew.cuddlesforclefts.com/uploads/1/3/2/8/132814969/jewigofofojitum.pdf
    • http://kokubaw.glucktravel.com/uploads/1/3/1/4/131406202/9816098.pdf
    • http://files.belavistaalqueve.com/uploads/1/3/1/6/131636903/fefifevob_kukabegozew.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/apc_jeans_fit_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/4768/0162/files/xipadawap.pdf
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/gabupapopofisun.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41448402009.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/84574248920.pdf
    • https://cdn.shopify.com/s/files/1/0447/5482/9463/files/que_es_la_alicina.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/wawidexeretalogeberisi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/86766375634.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/64486909391.pdf
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/39729561836.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/university_of_sydney_campus_map.pdf
    • https://cdn.shopify.com/s/files/1/0429/9823/5289/files/53035235607.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_off0000971e.bin
6f368de84564ac1eba45b9d200189803b310667e6873b92c36db5fe21ec55a46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x971E 5252 bytes
font_01_sfnt_off0000a8d2.bin
b99f1099dcb809efb1db9ee25c64d0c345136a54ef53c28bb1f79367ca3dc122		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8D2 14280 bytes
font_02_sfnt_off0000d57a.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD57A 4324 bytes

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