Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc073d5c9bd5b911…

MALICIOUS

PDF

47.7 KB Created: 2020-08-19 01:40:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0fa228ee3a7e7fdaea834517e28c04bf SHA-1: 0ecee0f0076734d358e3f3454afc456b7de3d6da SHA-256: cc073d5c9bd5b911e65959dff78119856a855c54a8c1211d649917c5b50b8ab1
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to domains associated with link farms and redirectors, such as ttraff.com. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=mla+format+for+conference+presentation', suggesting a lure related to academic formatting. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links indicates a likely attempt to redirect users to malicious content or phishing sites.

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=mla+format+for+conference+presentation
    • http://jodun.elizabethfeltsdesign.com/uploads/1/3/1/3/131381241/jelifutujisapij.pdf
    • http://files.countrysideimplements.com/uploads/1/3/1/6/131636825/riboxu.pdf
    • http://lakibapid.filmodrom.eu/uploads/1/3/1/4/131437987/vakovuxifolo_vemogag.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/ropuwajawugodenobipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3669/5959/files/colonel_bogey_clarinet_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0429/9164/8929/files/mental_retardation_causes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/73003012386.pdf
    • https://cdn.shopify.com/s/files/1/0440/7564/7128/files/maria_montessori_biography.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/46707443755.pdf
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/86287055922.pdf
    • https://cdn.shopify.com/s/files/1/0432/6958/7104/files/1521625129.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/lokosabugadozefila.pdf
    • https://cdn.shopify.com/s/files/1/0432/9386/8187/files/koxazuzopeki.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/core_java_tutorial_javatpoint.pdf
    • https://cdn.shopify.com/s/files/1/0435/4169/2570/files/20581353543.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_off000066f5.bin
9deb24c96a969dc465566158516407c0b306ce2035eced272ce36b13f2a83ab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F5 5168 bytes
font_01_sfnt_off00007870.bin
5b6729d1088a0e5c5f949504d865b756827993008f7962ac477f007b7dd3a3aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7870 10380 bytes
font_02_sfnt_off00009c27.bin
c5b81f703ebddc697e6824868dcd306aba919aa4c1ec28f594a83a04df97872b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C27 16144 bytes

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