PDF malware analysis — malicious · 8c1a7d0f794558df

MALICIOUS

PDF

50.3 KB Created: 2020-10-16 19:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10

MD5: 49390359f521f7986be1ba8d7fc69fe9 SHA-1: 11d167fb7f11e9573975d310920c0f9658fe6e16 SHA-256: 8c1a7d0f794558df9a6ea0013ed6b0951fbb0b942c592c749433d5f41c86a4ee

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://ggtraff.ru/123?keyword=ciclo+biologico+de+tetranychus+urticae+pdf In PDF document text
- https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/1302795.pdfIn PDF document text
- https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/712813.pdfIn PDF document text
- https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
- https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/2023217.pdfIn PDF document text
- https://xumogimunosu.weebly.com/uploads/1/3/1/6/131607683/0178282ef9a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365634/normal_5f87f69b2930b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367622/normal_5f87463c58b88.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/1/0500/2733/1734/files/gateway_nv55c_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/9382/8795/files/dudulabegororosatatupar.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0501/1541/2122/files/the_rubaiyat_of_omar_khayyam_edward_fitzgerald.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/6643/2935/files/mosedipixugig.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0492/7481/4620/files/dudusudalolominonunum.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0497/3513/9477/files/dd_3.5_character_builder_online.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/6629/6986/files/telangana_election_nomination_form.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0479/5190/4924/files/zowigipajudova.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/2278/6466/files/fundamental_mechanics_of_fluids_currie_solution_manual.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0482/8354/9857/files/digital_fx_option_price.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0435/7259/2801/files/lezosolabojunazapuk.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/1357/0199/files/auto_flat_rate_manual_free.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0478/6280/8742/files/3rd_grade_curriculum_homeschool.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0503/1496/9261/files/tasumokinuwara.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/6590/9143/files/kofakajoropibe.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_off00006af3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6AF3	5564 bytes
SHA-256: `2b1989ce99220e58bd1364da459df32c7e08ad702e2cd39b3df5e11577bfbfa4`
`font_01_sfnt_off00007dc9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7DC9	15512 bytes
SHA-256: `a9d8228ab0629e7f3c3079ada4aa004ff07f813963ab3a9c5e7e77b6837967f0`
`font_02_sfnt_off0000ad42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAD42	4324 bytes
SHA-256: `b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c`

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