Malicious PDF — malware analysis report

Static analysis result for SHA-256 49680abb11ffbbd5…

MALICIOUS

PDF

39.5 KB Created: 2020-08-20 18:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29595e8fb8e2113cddbd2f50a41cae82 SHA-1: 360e0d0f6600ed92f31d5b8e7d60e35054b64c45 SHA-256: 49680abb11ffbbd575332ba24852332554ae6fe98485448e81f19012b7e9239a
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a prominent malicious redirector URL, 'https://ttraff.cc/pify?keyword=premiere+pro+templates+free', which is presented as a lure for free Premiere Pro templates. This indicates a social engineering attack aimed at directing users to potentially harmful content. The ML classifier strongly supports the malicious nature of this PDF.

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=premiere+pro+templates+free
    • http://files.matthewshannon.net/uploads/1/3/1/3/131384169/4a04ffdca6.pdf
    • http://files.lynhouse.org/uploads/1/3/2/7/132741155/nidutizanu-zagutun-lakegoziv-lorolitoked.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/3287095291.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/tejibamu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/muruvaxenov.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/nulufovujajemurosatazib.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/death_of_a_salesman_summary_act_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/gangster_bengali_movie_free_720p.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78214852322.pdf
    • https://cdn.shopify.com/s/files/1/0437/9174/5175/files/bootstrap_form_center_div.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/67359274842.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dec.bin
fce895210f0afd67d97af8ed1d5807a975e5d5a46c089d423b68eee10e3e3e32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEC 5048 bytes
font_01_sfnt_off00006ef3.bin
135c618fc22007b145699427eb310301d23708805613d06d7bdd3d714de8341e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF3 10132 bytes

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