PDF malware analysis — malicious · bb70fa95ef4f9efe

MALICIOUS

PDF

51.4 KB Created: 2020-10-25 10:36:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01

MD5: f11891c88ea94cf9b573d20b4b5f4389 SHA-1: a5e6f33b4518b93f4e8c2c32a8d1bd6753d2c1d2 SHA-256: bb70fa95ef4f9efe60a8b789f7362bdd7a4d089ee98a3f771633df9957905552

194 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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.me/123?keyword=simplify+expressions+with+powers+worksheet In PDF document text
- https://cdn-cms.f-static.net/uploads/4369343/normal_5f89348462e6e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378160/normal_5f8a0f2906566.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/1/0482/6513/4244/files/download_whatsapp_plus_apk_softonic.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/0799/0184/files/falubisutofigewaji.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0429/9423/7593/files/bafulunogisivuxelisu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3a223770-cb96-4297-87db-0de26c906908/42576731183.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/7872/5021/files/38329227661.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/4097/6291/files/what_does_gc_mean_in_cycling.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0437/8404/4705/files/wipodobab.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/6898/3969/files/bullish_and_bearish_patterns.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/3826/8318/files/play_store_download_apk_for_jio_phone.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/303ddf5f-42ab-4e47-a7d2-55949c9f499e/kigobonajufov.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5b71e92c-c589-422d-9699-f7da2c6ae57a/gay_test_for_10_year_olds.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/54bb72dd-8846-4184-af75-52bc6afe07a4/96005256326.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/cbdb04ac-7d40-47ec-ae88-4cef780ab4c1/8172222293.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/6333/9927/files/letifiwodijugunudom.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/2435/3960/files/toshiba_ct_90366_manual.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006184.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6184	6744 bytes
SHA-256: `048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4`
`font_01_sfnt_off00007269.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7269	5360 bytes
SHA-256: `7f51f1e251fe27ef8a5d45dba5b0fdd594626020cb56ece81ec6a37b0324caeb`
`font_02_sfnt_off00008495.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8495	11072 bytes
SHA-256: `92f0f200f6fb161f69695721c65661d6af89528378dce1c9589c4acce8458fd6`
`font_03_sfnt_off0000aadd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAADD	16060 bytes
SHA-256: `c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c`

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