Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d54ce6cf9b5365c…

MALICIOUS

PDF

44.7 KB Created: 2020-08-16 22:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0819296e44fef18ab1befa951d06db9e SHA-1: a8c53fd366327ff28989c5339821fdd90e47646a SHA-256: 9d54ce6cf9b5365c238f7b2b85b2ba174befe2c1ef728d8ccefa6a95dba19a65
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious infrastructure, indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Enduring power of attorney template western australia' and the malicious URL, suggesting a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. The presence of multiple embedded URLs, many pointing to Shopify, suggests a link farm or content delivery network used to host malicious content.

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.ru/pify?keyword=enduring+power+of+attorney+template+western+australia
    • http://files.ashcosystems.com/uploads/1/3/0/7/130775865/zaxidunulanibi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/37012769282.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/dupofumegilap.pdf
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/nufudav.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6803/files/62311665437.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/happy_birthday_piano_easy.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/vazuf.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/black_dog_led_zeppelin_guitar.pdf
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/business_ethics_case_studies.pdf
    • https://cdn.shopify.com/s/files/1/0432/1368/4891/files/rasatifabugoluxadugu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/porapuvunerojinus.pdf
    • https://cdn.shopify.com/s/files/1/0433/7205/2643/files/kiwipixawiz.pdf
    • https://cdn.shopify.com/s/files/1/0437/8276/6750/files/antibioticos_veterinaria.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/free_printable_alphabet_worksheets.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/
    • https://cdn.shopify.com/s/files/1/0430/9119/8112/files/bu

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000633e.bin
0e10866f9c77208338ef5e9013750c432b5c8e3930ca5bff9e8dc41ed4321637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633E 5396 bytes
font_01_sfnt_off00007593.bin
14a4ddb1d4598a5bf34703d2e69723691c320cd5a2119f40fc6b7a54c4bd0f6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7593 9888 bytes
font_02_sfnt_off00009750.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9750 4324 bytes

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