Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa611e799e69b95…

MALICIOUS

PDF

62.7 KB Created: 2020-07-27 15:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 184770ba9cdd23cfa1c46b1ee6766c64 SHA-1: d5d330631edebebe25f1514dd72207652c4d1521 SHA-256: 1aa611e799e69b956ccf17a23eee2f45d659a82ccce3d87cf17c68965ea37a98
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector pointing to 'ttraff.com'. The document body, though heavily obfuscated, appears to be a lure related to a 'Manual subaru outback 2019 español'. The presence of a large number of external PDF links, many hosted on shopify.com, suggests a link farm or SEO manipulation tactic to distribute the malicious content. The ML classifier strongly indicates maliciousness.

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.com/wb?keyword=manual%20subaru%20outback%202019%20espa%C3%B1ol
    • http://files.ddeacademy.com/uploads/1/3/1/8/131857476/55737269.pdf
    • http://files.tmichaelstone.com/uploads/1/3/1/8/131871952/09e21c4bc4086.pdf
    • http://files.silviareiche.com/uploads/1/3/1/1/131163683/vidiwenorewigi-biwapupupal-natufi.pdf
    • http://files.silviareiche.com/uploads/1/3/1/1/131163683/vidiwenorewigi-
    • https://cdn.shopify.com/s/files/1/0434/5511/9520/files/41144547029.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/64989875230.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/13436297025.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/5648969571.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4939/files/fowofogasipoxesiduw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/16196074893.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2918/files/29620512804.pdf
    • https://cdn.shopify.com/s/files/1/0437/3928/3608/files/xiludedabufodavosokaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/25545774976.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0435/0928/5024/files/ziluxefafuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/16709051725.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/repiwarufojizedo.pdf
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/xirafilozusowasapulupo.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_off00009d28.bin
952f63f3e513bf4d619162890a9caa9971e220fefef349a5474a615f7d0b56e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D28 6800 bytes
font_01_sfnt_off0000b46f.bin
75082a856ed6cf624c0a074016b169d01f18fa17e9bad30ac90e431267638a19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB46F 5664 bytes
font_02_sfnt_off0000c777.bin
70172de86d19a66a2ee72456095d493f2ead749fb39958364f85fef43fb581b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC777 10348 bytes

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