PDF malware analysis — malicious · 4bbd77c38fe71f4f

MALICIOUS

PDF

50.1 KB Created: 2020-10-27 19:45:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: bc991563437787160a10e52eedd30a1f SHA-1: 8d506fee83295ed33c4cdaf377b4efa43c14805f SHA-256: 4bbd77c38fe71f4f4f680ee12c2fd37989e88c7c0b972ec966530b96afd1f848

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. This suggests a link farm or SEO poisoning tactic designed to lure users to malicious infrastructure. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of embedded URLs and the heuristic firings strongly suggest a phishing or redirection attack.

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://cctraff.ru/strik?keyword=eliminator+weed+killer In PDF document text
- https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/bulibaxem-ninunixi-fozodosabijazi-xalawebike.pdfIn PDF document text
- https://bafovulik.weebly.com/uploads/1/3/1/0/131070506/f33ade76.pdfIn PDF document text
- https://xukaxikerebata.weebly.com/uploads/1/3/4/0/134042698/kufofupow_ruzevemonobo_neniz_dopawi.pdfIn PDF document text
- https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/kariwogagalan.pdfIn PDF document text
- https://butiziro.weebly.com/uploads/1/3/4/3/134308177/gedoz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372087/normal_5f8d4ef668a80.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369782/normal_5f8807e3a5e9f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379855/normal_5f8f14ad3b8f1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374517/normal_5f891f990bbe0.pdfIn PDF document text
- https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/fokebojepixenupibiw.pdfIn PDF document text
- https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/314c179480.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://cdn.shopify.com/s/files/1/0499/8365/1990/files/sriram_ias_economy_2020.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/9546/7195/files/sizimamuxetumolomedutawil.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0500/4171/6906/files/bawenowifegiwuxibo.pdfIn PDF document text
- https://s3.amazonaws.com/mijedusovineti/8th_grade_math_worksheet.pdfIn PDF document text
- https://s3.amazonaws.com/miwolezedubujoz/jigogome.pdfIn PDF document text
- https://s3.amazonaws.com/tugumeb/recetas_de_comidas_saludables_y_faciles_de_preparar.pdfIn PDF document text
- https://s3.amazonaws.com/tadovu/megupavowatavetupokit.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0504/6901/1634/files/5724908349.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0268/7831/2625/files/rivunon.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/6035/3429/files/golele.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0498/3717/9042/files/north_face_apex_flex_gtx_2.0.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/0908/4072/files/free_psychic_question_answered_immediately_online.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000075f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x75F5	4692 bytes
SHA-256: `a01a37dc348a7e96db3a8ed30e05ef9313c959120fac15b3335e2e3eb7880122`
`font_01_sfnt_off000085d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x85D4	11440 bytes
SHA-256: `f9752221367de2a92bb155865b4386cafe0b64791cc8419f754f3ebbe9349148`
`font_02_sfnt_off0000acb1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xACB1	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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