PDF malware analysis — malicious · 2d9d05a7d9ca73d1

MALICIOUS

PDF

89.3 KB Created: 2020-10-16 20:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22

MD5: e5b01d3a0cfdfb5eea05d4f26a709c6a SHA-1: fa22ac57c3b3f65da67c28ca8b0d6f6a5cbc46b5 SHA-256: 2d9d05a7d9ca73d1302e64f87213552d301958a9f9454f8fa29f79bdab090beb

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded links, many pointing to benign Shopify URLs, but one critical link leads to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for free downloads, which aligns with the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be tricking users into clicking the malicious redirector URL, likely leading to further malicious content or exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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://ttraff.link/123?keyword=marathi+fishpond+pdf+free+download In PDF document text
- https://cdn-cms.f-static.net/uploads/4367004/normal_5f88c86313136.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365606/normal_5f86f9cc3bfb0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366331/normal_5f87381a1f19f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366000/normal_5f8737dcca50c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366659/normal_5f88957fdab92.pdfIn PDF document text
- https://wopuremob.weebly.com/uploads/1/3/2/6/132696580/dugiwaki.pdfIn PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dolopitubolagu.pdfIn PDF document text
- https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/xawapebuw.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/9465/8206/files/electricity_calculations_study_worksheet_answers.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0485/0057/2315/files/vadibusatezuzikiwewim.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0464/6656/4254/files/sajisijuzozinojumixa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0433/9207/3895/files/gross_profit_margin_ratio.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0fa04368-84e5-4371-a1fd-b011703f476f/kambi_katha_app.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/59d33368-fd83-494e-a705-4295a87fb482/livajinedenavapixedipe.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/64948d4b-aff8-471b-bcb3-7b777145fa09/91471359120.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bb74dc0f-7f7d-4ce6-abc6-459191e34f32/36904407240.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0481/3406/2231/files/native_american_eagle_names.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/2958/0952/files/riemann_sum_worksheet_with_answers.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0499/7890/0640/files/guardian_life_5k_registration_form.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0479/8237/9164/files/69051966708.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6238c416-c1a2-480a-899a-9966b95f65b5/88390205157.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ce69d088-3a82-420e-a27d-a0e082f9df49/lasazagamanagem.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_off0000ff70.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF70	5224 bytes
SHA-256: `1126200bc9a28612e56cfa4530564c63e9e1290b0b6c73621afbe0f7909f5cd5`
`font_01_sfnt_off00011144.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11144	13828 bytes
SHA-256: `a363266944f6c8451f36dead23e00b0b02ee94b9cbee48af8955b3b0dce63aee`
`font_02_sfnt_off00013da9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13DA9	6748 bytes
SHA-256: `e501e0a2950c08fd7fdc6537a8b925b6d085e5a6ec3def907b3b40c7ee840f21`

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