Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff20cc2d649cda3…

MALICIOUS

PDF

44.1 KB Created: 2020-09-06 04:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8dd771a97dd678aee50ff50ce27a4cb SHA-1: b09930785c856ce72f991b87a35a921c5039607a SHA-256: 7ff20cc2d649cda39147d3b687805aa373d58d5091696e2a42b27bd25ff1b416
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a deceptive title and numerous embedded links, a technique often used for phishing or malware distribution. One of the embedded URLs, 'https://ttraff.me/wix?keyword=fast+online+video+er+from+any+site', is identified as a malicious redirector. The presence of a large number of links, including a link to a PDF on Shopify, suggests an attempt to create a link farm or distribute content through multiple avenues. The ML classifier strongly flagged this PDF as malicious.

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.me/wix?keyword=fast+online+video+er+from+any+site
    • https://cdn.shopify.com/s/files/1/0433/6533/5208/files/kit_dan_logo_dls_persija.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/90753425750.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/82389159578.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/1270819207.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/71396032418.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdf
    • https://cdn.shopify.com/s/files/1/0428/6719/6063/files/corrigC3A9_crpe_franC3A7ais_2016.pdf
    • https://cdn.shopify.com/s/files/1/0431/3848/2332/files/jaxabefasukot.pdf
    • https://cdn.shopify.com/s/files/1/0454/3217/6808/files/niberu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0721/2694/files/difujevavo.pdf
    • https://cdn.shopify.com/s/files/1/0452/8999/6450/files/12436328841.pdf
    • https://cdn.shopify.com/s/files/1/0451/1966/8377/files/fourier_transform_properties.pdf
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/schwartz_absite_review.pdf
    • https://static.usrfiles.com/ugd/b8c837_2100d23ced5a494985e5751a87342560.pdf
    • https://static.usrfiles.com/ugd/d3758e_d391949e69084434b4e5064ba74ea693.pdf
    • https://static.usrfiles.com/ugd/738632_197ba42f68f14cc0bc3fa2e4dbd393c0.pdf
    • https://static.usrfiles.com/ugd/fd7405_12da5736b956479f94d03f4a0b93d1ef.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_off00006f49.bin
0917996f95c8199e15237a2e051b8b777948076e91e9d77fdb4605d5d0605227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F49 5168 bytes
font_01_sfnt_off000080d7.bin
5dbec86999c3fb2b8c9347da88d8f1236b1c3ba03fdb8804b3e19e5ac17997a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D7 10080 bytes

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