PDF malware analysis — malicious · 134e35f787c05c13

MALICIOUS

PDF

40.0 KB Created: 2020-09-01 03:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 2da3adbe4a47906c291055afb1490295 SHA-1: cf7e26acf1ad2c33e175dd0fea9189f2661bfd91 SHA-256: 134e35f787c05c13006a70e892f974aa8cd854caa8a6e94a32a8c9ba8c373dca

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by a machine learning classifier and contains a link to a known malicious redirector. The document also hosts a large number of other PDF files, likely as part of a link farm to improve search engine ranking for the malicious lure. The primary IOC is the redirector URL, which is likely used to deliver a secondary payload.

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/wix?keyword=tuna+fishing+report+coos+bay+oregon
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0458/2804/7011/files/comprehension_passage_worksheets_for_grade_3.pdf
- https://cdn.shopify.com/s/files/1/0430/9044/4445/files/los_caballeros_del_zodiaco_omega_capitulo_1.pdf
- https://cdn.shopify.com/s/files/1/0431/1898/5370/files/badminton_score_sheet_doubles.pdf
- https://static.usrfiles.com/ugd/4b68be_c35d7343d0fb49d98b63747e794a4bf4.pdf
- https://static.usrfiles.com/ugd/3794ad_de62d8fb581b48ac8b8968703ec101a0.pdf
- https://static.usrfiles.com/ugd/b8c837_f52213360b5940f59a8611a098400615.pdf
- https://static.usrfiles.com/ugd/b8c837_b935ffb06d364bbbab26a4ffbc5f59e0.pdf
- https://static.usrfiles.com/ugd/b8c837_a920866a8e33486899fdeb664e02dd8b.pdf
- https://static.usrfiles.com/ugd/0aab01_b5f9de4f2df442638263cd5fb69bf52f.pdf
- https://static.usrfiles.com/ugd/0f5b72_17d1ff8b255f4bb8925675492dc3a07b.pdf
- https://cdn.shopify.com/s/files/1/0437/1726/3510/files/49608748036.pdf
- https://cdn.shopify.com/s/files/1/0432/4940/2024/files/gluing_acrylic_sheets_together.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00005d4e.bin` `c4cf63235bcc39f59959906f0c77515756f24110a69c7fe89a17db8322b4c96c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5D4E	5436 bytes
`font_01_sfnt_off00006fd0.bin` `7742addd8387affbda04fdd0381e2a2615e77b52ae92b68f3f69ce9b94482d0d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6FD0	10644 bytes

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