Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b152eacb932044…

MALICIOUS

PDF

48.8 KB Created: 2020-08-30 22:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f237783ea0465b4eadaf5463fa0d1ed SHA-1: 90c4c4a9ea75be92bcfaccb8189af5fc4ef6ed25 SHA-256: 68b152eacb932044e983432f0da140262cfc5c6d66d23626ab8dbfb29383343d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and keywords suggesting a lure. The presence of many external links, including to Shopify, indicates a potential link farm or SEO manipulation tactic. The ML classifier also strongly indicated 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.ru/wix?keyword=westinghouse+christmas+light+timer+i
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6886/6214/files/confessions_of_a_dangerous_mind_2019.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/diliwekesatojijubonamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8263/files/probability_and_statistics_for_data_science_matloff.pdf
    • https://cdn.shopify.com/s/files/1/0449/1807/9655/files/69556859056.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/10809735118.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/gorolunokanuvada.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/67513010126.pdf
    • https://cdn.shopify.com/s/files/1/0437/0307/4984/files/angular_6_formcontrol_get_value.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3746/files/gmat_practice_test_2017.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/74953353910.pdf
    • https://cdn.shopify.com/s/files/1/0440/2901/8262/files/mekarozewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/muxagegapujivolatabilafi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/kosafojamugusixotin.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/19317268962.pdf
    • https://cdn.shopify.com/s/files/1/0435/7780/2911/files/vojoretasokegu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9217/3217/files/sokavebisaleteware.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008087.bin
650ad2ea2bddfb7aa63fa5b905111a229107333531c2aaa7970eaa699de7809a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8087 5228 bytes
font_01_sfnt_off00009229.bin
6faa5efe2cec7254748114f6eb3194861eedd26d519e6fd389e199fb6a36df42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9229 10420 bytes

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