Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdcdd7cc59890de…

MALICIOUS

PDF

75.4 KB Created: 2020-08-14 14:39:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc1f7d36d970a985a00b5cd06495f5f4 SHA-1: 635babeda85349fcc9ed2f288fafdfe2f2f25122 SHA-256: abdcdd7cc59890de8f6ec0731143ea9264f45ee7347e09084701187f9e7de414
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are SEO-themed. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

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/pify?keyword=darling+in+the+franxx+character+sheet
    • http://files.mountainlifemontana.com/uploads/1/3/2/7/132710661/3645420.pdf
    • http://files.miracleslora.com/uploads/1/3/0/7/130776166/5965049.pdf
    • http://files.bslartquilts.com/uploads/1/3/1/4/131453633/pixodatesisuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/2718/3269/files/alternating_current_circuits_4th_edition_solution.pdf
    • https://cdn.shopify.com/s/files/1/0438/1350/3133/files/likavozepe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/outdoor_furniture_plans_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/5345/6289/files/21682232700.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/rafilusexojerawipalivug.pdf
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/vozafir.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7545/files/pivufegiboxapavarunitas.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/goxuwuzusimobu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/66993277935.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/zagarumogekabukesubeluwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/1565/8920/files/kojokatawopemu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8280/0542/files/giligudufizuvure.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a39d.bin
6fb7adf1a314a451b84221895cff9eca81e76373aaeb7575a48955fbf0f116e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA39D 15620 bytes
font_01_sfnt_off0000d535.bin
4af12bbae5d4baebcd22d87f090d6031dd3b4db6ef48d4050e128ccf29682db4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD535 5208 bytes
font_02_sfnt_off0000e6ee.bin
0a75c7aa04a2e066a5ff00e8fcc8b4d8e298ae9eb2db3bd038bf39994cec5f78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EE 10380 bytes
font_03_sfnt_off00010ab0.bin
a7889b5b43f4fa3934884b1b7ce4c7fe08b55fe015fc73e5217f2a7ce2d997cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB0 16084 bytes

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