PDF malware analysis — malicious · ba11a3bd4a5b44ce

MALICIOUS

PDF

42.0 KB Created: 2020-10-21 08:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25

MD5: 03e6a1b6938fef03178144c4198828a8 SHA-1: bb2e97c096dfdfd26fd6071b1fc04258d5dd0808 SHA-256: ba11a3bd4a5b44cec8f89d9ceb312bf5b0c9b96f12b9a18d1d9d3b78ce408343

202 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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.com/pify?keyword=download+samurai+shodown+3+android In PDF document text
- https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/1e409de2f59e4b8.pdfIn PDF document text
- https://korodaziso.weebly.com/uploads/1/3/0/7/130740443/3218686.pdfIn PDF document text
- https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/kimedewif.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/df849ce3-05b3-4c01-a4d6-8205912c406f/zebigazovijel.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/72e36dff-29ed-45c3-9284-aae8bc04ad1c/48264597608.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4fd33f29-db61-43c8-b40e-68db99f92271/tusiger.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e2108e01-427c-4c15-beb6-cbacbd95a8ba/6241584175.pdfIn PDF document text
- https://s3.amazonaws.com/sugaguxagu/shrimad_bhagwat_geeta_free_download.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files2/27571741255.pdfIn PDF document text
- https://s3.amazonaws.com/gupuso/pajerebowifi.pdfIn PDF document text
- https://s3.amazonaws.com/wonoti/rosebivikixomogewepafozo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4ac40fe5-d72a-4d7d-8531-29b813062d80/47982733389.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5c198c3a-5a69-4181-97e9-9338d75bf5c7/81923158285.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/94dc73b2-51fd-4f9c-85ea-7b0ac8bfc52b/zevakojipuxunap.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b775e063-f3a7-42c3-9f07-a92e9129f081/jilapun.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b3db2996-5464-4df0-b8f9-da30b2da2995/95293657765.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8a4140a7-c589-4ae2-a07e-d3a5240bc918/bibaroxajitibexonefu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c3605cfa-7043-4057-9f47-06a59a72927a/yn_560_iii_set_group.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files2/someparepokabeseg.pdfIn PDF document text
- https://s3.amazonaws.com/henghuili-files/21359168295.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_off000054a0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x54A0	4540 bytes
SHA-256: `53cd19bfd8c36755952a7d20c92208384bb504a65aed6e5223bbf7b71d96b875`
`font_01_sfnt_off0000649b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x649B	5320 bytes
SHA-256: `0cbde0c15a82e2905fca960fa5b34f82cce3782c57e08e7c4698786761f2a171`
`font_02_sfnt_off00007695.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7695	10728 bytes
SHA-256: `cab4586ee15939877a8de608c36069b2534bc58e4939e174775df45f116c9ea6`

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