PDF malware analysis — malicious · 45ee43c437fea1ba

MALICIOUS

PDF

51.6 KB Created: 2020-10-17 09:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14

MD5: e491834b4daafbcb8d2d1531c8204af7 SHA-1: 2d37c9f77406078578466d0cf59eae597fd6b712 SHA-256: 45ee43c437fea1ba60c2e8a2e86ce9d758a81d30eba19adb7aa8e58cbedbb847

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a link farm and a specific malicious redirector URL, disguised as physics exercises. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests an attempt to distribute malware or lead users to phishing sites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.ru/123?keyword=movimiento+parabolico+ejercicios+resueltos+paso+paso+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4373527/normal_5f8992ee7014f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376875/normal_5f89c03562c02.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365652/normal_5f87212487283.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374535/normal_5f8a895536e47.pdfIn PDF document text
- https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/vukubupepumizo.pdfIn PDF document text
- https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/wirexanusir.pdfIn PDF document text
- https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/zakadox.pdfIn PDF document text
- https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/a63fb.pdfIn PDF document text
- https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/namona.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369507/normal_5f87f2beea727.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369919/normal_5f8879fa8bf1d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366048/normal_5f887d44639ca.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369900/normal_5f87ff5f87b2d.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/1/0493/1734/7514/files/87349115998.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0268/8011/4859/files/arcane_mage_pvp_guide.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/5346/5243/files/tukiwezojajinow.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0496/0888/4375/files/12306308837.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/0513/2456/files/30151508025.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0494/2043/5623/files/interpreting_distance_time_graphs_worksheet_answers.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0431/0679/5686/files/buzekikizugafaduvixes.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/0128/1703/files/vujejarixisima.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0485/0076/8930/files/1549608050.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0266/9510/6754/files/1591523277.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0483/9702/5440/files/farming_simulator_14_hack_apk_mod.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/0546/0125/files/54817933642.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007019.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7019	5584 bytes
SHA-256: `af01366646fdcdda4f4dde2dcb7c4437906e946feb4a952cead45198e0ff059d`
`font_01_sfnt_off00008300.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8300	11540 bytes
SHA-256: `a690f045bb414c7921649c9f3b56ecae7b68bce726a61ab56535c3ae5e2bda77`
`font_02_sfnt_off0000a852.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xA852	16184 bytes
SHA-256: `00daca6849bbdd194b684c1e95b2b1673f0050aad9409c25aeb0c15e584586af`

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