PDF malware analysis — malicious · b6c735548e067138

MALICIOUS

PDF

53.4 KB Created: 2020-10-27 19:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 5b133c79f420c373309ccd840db37a7e SHA-1: 3414039771f6766b5768e424590c832a487d93de SHA-256: b6c735548e067138e0d10dbf9789bdc29587cf1a03bd3775c77bd7803cc2ade6

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded links, many pointing to S3 buckets and Weebly domains, suggesting a link farm or SEO spam operation. One critical heuristic firing indicates a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure, directing users to a site related to population growth effects on natural resources.

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.club/123?keyword=effects+of+population+growth+on+natural+resources In PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/xereromejiv-koxozirusoror-moxonujis.pdfIn PDF document text
- https://dopuxaponaxu.weebly.com/uploads/1/3/2/6/132695391/e679d1802a7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380682/normal_5f96a1164535f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404107/normal_5f984c18d72e1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408355/normal_5f958f3c8a879.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368760/normal_5f9124d01e945.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366027/normal_5f91c625cc96d.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/jadere/davubav.pdfIn PDF document text
- https://s3.amazonaws.com/gafedupeba/dk_illustrated_oxford_dictionary_free_download.pdfIn PDF document text
- https://s3.amazonaws.com/zirojopemup/m13_phage.pdfIn PDF document text
- https://s3.amazonaws.com/xakapudakadu/77816552263.pdfIn PDF document text
- https://s3.amazonaws.com/vexeliku/33800601250.pdfIn PDF document text
- https://s3.amazonaws.com/tetazino/74022550814.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6c538b58-fa8c-4de3-90be-a22a9bedccf8/windows_10_resolution_problem.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/10ecbcec-075c-44e9-97f8-53620416664a/narasimha_kavacham_telugu_download.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4607804c-115b-4a8d-8f8c-8d91e7d02b69/our_friend_martin_elementary.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7c0ebfe3-6912-47e7-a1ec-0b65e303e124/25839184695.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0f90228f-b1c6-4608-9c15-6e18e8fdc970/37640974405.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/4492/0726/files/java_aptitude_questions_with_answers_download.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/4488/1059/files/86930836644.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/9669/7749/files/giant_propel_advanced_disc_size_guide.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/7759/4005/files/98444595454.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/9075/6252/files/bottle_flip_3d_mod_apk_unlimited_money.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007ab0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7AB0	5328 bytes
SHA-256: `8185050169a9191520e55134c3fdf328bdd75787dd7b36c35496f9c88abb5125`
`font_01_sfnt_off00008cdf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8CDF	11004 bytes
SHA-256: `68853d733790beb02f30578c4f8ae48497184cd07599a23185c4f5a0e43d3d1a`
`font_02_sfnt_off0000b1f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1F2	16204 bytes
SHA-256: `a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd`

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