PDF malware analysis — malicious · 1b5890be53225266

MALICIOUS

PDF

37.0 KB Created: 2020-08-11 19:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: a34fb5c51656014820deeb9963bb7e44 SHA-1: 1829ad4be6ab3584b03604e58538593418a0ebc8 SHA-256: 1b5890be53225266b89c76256769502d2882d0f1b4db51768f80259e5abe3dc1

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though malformed, contains the URL 'https://ttraff.com/pify?keyword=imperative+verbs+worksheets+pdf', suggesting a lure to download a worksheet. The presence of numerous other PDF links, many hosted on Shopify, further supports the link farm tactic. The ML classifier strongly supports the malicious nature of this PDF.

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.
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.
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.com/pify?keyword=imperative+verbs+worksheets+pdf
- http://files.ingridasanchez.com/uploads/1/3/0/8/130874110/xadix_fuxawemuvexo_muvikotugowex_nazukonidosisaz.pdf
- http://kapaj.muviscomm.com/uploads/1/3/2/6/132681409/fosajazipufaka.pdf
- http://files.burmusik.com/uploads/1/3/1/4/131437247/cb386.pdf
- http://files.brandywineseptic.com/uploads/1/3/2/6/132696335/zazamavabutoj.pdf
- http://dufafemi.sportingservicesdressage.com/uploads/1/3/2/8/132814930/3ddc202e.pdf
- https://cdn.shopify.com/s/files/1/0439/4637/7374/files/75140524600.pdf
- https://cdn.shopify.com/s/files/1/0432/1103/0683/files/21126208627.pdf
- https://cdn.shopify.com/s/files/1/0437/6163/1389/files/all_perfect_tenses_exercises.pdf
- https://cdn.shopify.com/s/files/1/0429/4469/2383/files/xogojesikebiteboxafefive.pdf
- https://cdn.shopify.com/s/files/1/0429/9912/0033/files/gixabapomigejugo.pdf
- https://cdn.shopify.com/s/files/1/0432/9085/3534/files/83918408745.pdf
- https://cdn.shopify.com/s/files/1/0428/1958/4166/files/73153517505.pdf
- https://cdn.shopify.com/s/files/1/0428/9747/3699/files/lufuda.pdf
- https://cdn.shopify.com/s/files/1/0434/4840/2081/files/telorewizolidex.pdf
- https://cdn.shopify.com/s/files/1/0449/7352/3112/files/july_month_current_affairs_2020_testbook.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00004802.bin` `3d41ab0d4eedbc5094e1c78d518077cb686b2b07c7299b250cd344afe93af1f7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4802	5224 bytes
`font_01_sfnt_off000059c9.bin` `ae63190ffe3a0a4480d1f8667d290a8a6b94a89fe1af3a4a9a648ba2f8e0f0c5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x59C9	9156 bytes
`font_02_sfnt_off00007926.bin` `4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7926	4324 bytes

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