PDF malware analysis — malicious · f85282221d6d2e65

MALICIOUS

PDF

61.0 KB Created: 2020-10-19 00:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: 050dcb990f819c8593646c886d8533fd SHA-1: ee470c0f95262544dd503c251f7e5a739d05fae8 SHA-256: f85282221d6d2e65d355d3ab696f40556365688494a3026e7b2eab8038bfe8be

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, with a critical heuristic identifying it as a PDF link farm. One of the primary links directs to a known malicious redirector, 'ggtraff.ru', which is likely used to distribute further malicious content or phishing pages. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the structure and embedded links suggest an attempt to drive traffic to malicious infrastructure.

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://ggtraff.ru/strik?keyword=libro+utopia+para+realistas In PDF document text
- https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/48ff2277d.pdfIn PDF document text
- https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/e15f111a1112.pdfIn PDF document text
- https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/5797463.pdfIn PDF document text
- https://ziripovopibew.weebly.com/uploads/1/3/0/8/130874468/bupirufuxa-bovob.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369514/normal_5f88059a58fce.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368991/normal_5f89995b8e5b8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366341/normal_5f871582195f9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367622/normal_5f8b5d8981c02.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372983/normal_5f8aedc004f93.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/1/0476/8936/7718/files/sunezejobobitedunape.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0498/1194/7682/files/dbq_french_revolution.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0436/5749/4693/files/35934357763.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8c1216bd-ef66-4df0-a691-2d857daf3802/kimaweligomisoli.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3b4bce87-0d7b-408b-b9a3-1faa5dfc432e/62360351411.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/548a4b5e-95d6-4156-b8cb-cef0fc7b9d4f/xetapodulajukigibabet.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/8881/3461/files/4th_grade_math_worksheets_fractions_and_decimals.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/1070/6619/files/oxford_english_books.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0493/1819/9462/files/openwrt_uci_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0441/1670/5432/files/54357360943.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/9383/5432/files/acr_guidelines_for_rheumatoid_arthritis_2020.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0467/7943/3113/files/24_italian_songs_and_arias_soprano.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/7074/9856/files/city_of_waukee_building_permits.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_off00008709.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8709	4896 bytes
SHA-256: `7b6a4385ee6a9fd5c94601cabfc4ed02b72954101282e4e1988989522c32f1f9`
`font_01_sfnt_off000097b3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x97B3	17400 bytes
SHA-256: `a9b60063f74b6588c966814ab88871b940eef92f9f697615eef56335d486a66b`
`font_02_sfnt_off0000ccbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCCBB	16992 bytes
SHA-256: `f3f3726cbcf22c5f8c1b47e41b1031e4cebaa1dbde95d86bb92d64a405353655`

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