PDF malware analysis — malicious · bd9f0bb05a1d63ae

MALICIOUS

PDF

34.2 KB Created: 2020-10-08 18:58:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 2d32f34c942bccdd51f1f21fdad1b780 SHA-1: fcc8a0b1602778a42caf35dce70fa85eb2aca16c SHA-256: bd9f0bb05a1d63ae245d9d3fc9102febfe11d16a3adad94d2fc28e3514487d9a

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.club/pify?keyword=at+home+austin+290'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely serving as a lure for further compromise.

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.
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.club/pify?keyword=at+home+austin+290 In PDF document text
- https://site-1039285.mozfiles.com/files/1039285/66464705513.pdfIn PDF document text
- https://site-1036826.mozfiles.com/files/1036826/nobigigunafelaki.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/3653/1614/files/regrowth_minecraft_wood.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/3571/6503/files/ap_biology_model_test_1_answer_key.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/7168/7835/files/switch_giveaway_august_2020.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/4137/7434/files/chemistry_can_be_pun_worksheet_answers.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/46a92f5c-b088-4c05-968f-b0393238e088/99462568598.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0430/6557/3537/files/ap_computer_science_principles_unit_2_practice_test.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/8085/1364/files/pemigupasunosanofovu.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000491c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x491C	5216 bytes
SHA-256: `20ea0cc2d5aa52f6a986fc1e8c7538b512daed6d09f461033396fd40f8970a35`
`font_01_sfnt_off00005aaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5AAA	9912 bytes
SHA-256: `72e999c7a3e280793f156d6c6eb58611c6af996c2b5d96ffeecdce273abe6fee`

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