PDF malware analysis — malicious · 3bcebe56a99822b2

MALICIOUS

PDF

43.3 KB Created: 2020-09-11 07:03:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a8619ce307e857b001a0b803033d3da4 SHA-1: ab6daa9affaa93b160361c0c19651324c83de0c7 SHA-256: 3bcebe56a99822b2d5e6d267520220d54e4e0aee8ad2305bd6c61854aafab1fd

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/wix?keyword=play+store+update+free++for+android'. This URL is presented to the user as a lure for a 'play store update'. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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.link/wix?keyword=play+store+update+free++for+android
- https://cdn.shopify.com/s/files/1/0433/5910/9279/files/national_osteoporosis_foundation_guidelines_2019.pdf
- https://cdn.shopify.com/s/files/1/0430/0596/8537/files/pugesinazejonazexogak.pdf
- https://cdn.shopify.com/s/files/1/0433/9925/0081/files/xumusetemivevituf.pdf
- https://cdn.shopify.com/s/files/1/0435/1652/6752/files/bright_field_microscopy.pdf
- https://cdn.shopify.com/s/files/1/0434/1995/9454/files/comma_splice_worksheet.pdf
- https://cdn.shopify.com/s/files/1/0438/1242/1789/files/opera_browser_apk_for_android_4._0.pdf
- https://static.usrfiles.com/ugd/98e298_a784dcfb559e48b89b82371a68c9b7e5.pdf
- https://static.usrfiles.com/ugd/69695d_1d8c5a8cfc8742ecbc5a93d40dab5613.pdf
- https://static.usrfiles.com/ugd/ef7b09_977215f2c4e14dbcb4a902658264a1f9.pdf
- https://static.usrfiles.com/ugd/8acad3_9ee95e6d226b444b9fc20267247b76a2.pdf
- https://static.usrfiles.com/ugd/de60da_e96e1b7e6bcc4565a7e7d4dc3a7b6748.pdf
- https://static.usrfiles.com/ugd/6924eb_1196574b260540b09218d85ca94afa5e.pdf
- https://static.usrfiles.com/ugd/e33828_c456c5fb14e54ab881d15b81662d397f.pdf
- https://static.usrfiles.com/ugd/912de2_e1b856feceb540fb9c64970c17574602.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00006249.bin` `7995b61bc514429b53be8ff176632cb050e23442f79b423278703c55f2e441a7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6249	3016 bytes
`font_01_sfnt_off00006d1c.bin` `67ce22f77f612b574e688a12e1db03672a06f7e69f921a3c34828683b0e578a4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6D1C	5140 bytes
`font_02_sfnt_off00007eaf.bin` `53d96660758a12a8fa257cf85151201bd7a30e2b4f4086000184dd1974bf784f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7EAF	9800 bytes

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