Malicious PDF — malware analysis report

Static analysis result for SHA-256 368014f7cf15d4e2…

MALICIOUS

PDF

54.1 KB Created: 2020-08-06 02:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 377443e2411787a760adc64bfb2331f4 SHA-1: 0651ff6497ee31dac71087412ee6cfebfb438747 SHA-256: 368014f7cf15d4e256e5a41450ca3fad41081f034dbfba8e2e36020f2ff8bdcd
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the URL https://ttraff.cc/pify?keyword=carrom+board+rules+in+kannada+pdf points to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many of which are likely part of a link farm designed to attract traffic. The ML_NYX_PDF_MALICIOUS classifier also strongly indicates malicious intent. The document body, though heavily obfuscated, contains the suspicious URL, suggesting it is the primary lure.

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=carrom+board+rules+in+kannada+pdf
    • http://rizori.nycbroadway.net/uploads/1/3/1/0/131070450/rotudinolalan-gilisaxuna.pdf
    • http://files.alexkleinphoto.com/uploads/1/3/1/4/131410012/6555634.pdf
    • http://files.raynecreative.org/uploads/1/3/0/9/130969183/8bdbbee4c.pdf
    • https://cdn.shopify.com/s/files/1/0430/7160/2855/files/what_is_officeclicktorun._exe.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2805/files/ap_computer_science_2016_free_response.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/kogolusovonebebebolujaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/wufof.pdf
    • https://cdn.shopify.com/s/files/1/0429/7824/6815/files/10261884269.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/89941244664.pdf
    • https://cdn.shopify.com/s/files/1/0429/5449/0012/files/tasoko.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/deputekimepozoma.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/78716612745.pdf
    • https://cdn.shopify.com/s/files/1/0432/5736/4638/files/mac_os_spigot.pdf
    • https://cdn.shopify.com/s/files/1/0434/8225/1421/files/13216458538.pdf
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/skate_3_cheats_codes_ps3.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/kagepamolaxubefafuturopa.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_off000086fb.bin
6b5100c0c9a1331671bb8ae98da7488cc1b6146885b5a80a0c7b29afbd97188f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86FB 4204 bytes
font_01_sfnt_off000095b9.bin
a3f147485dd49b3a8b33d5ca49aa45fcc54b95a32c7623874952c5dfe1166b6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B9 5296 bytes
font_02_sfnt_off0000a798.bin
6bf5d0b78e0da9106157416229206d78863aafbaa8cc2b4829795c8bc473eab5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA798 10272 bytes

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