PDF malware analysis — malicious · f7ee4dc79e94b895

MALICIOUS

PDF

55.0 KB Created: 2020-10-25 21:13:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02

MD5: 3598e077cbf16c6d47a092b4489db384 SHA-1: d93c072f485591b976fa04cfd4095fb72a3158c8 SHA-256: f7ee4dc79e94b895a49e61fd103d2e248bdec91263312da5f7865d63ba2ba84c

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.me/123?keyword=variabilidad+genetica+definicion+pdf In PDF document text
- https://cdn-cms.f-static.net/uploads/4369525/normal_5f890d51ee128.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4391314/normal_5f8e03abb69f1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367290/normal_5f8b6798884f4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365659/normal_5f872a93248b0.pdfIn PDF document text
- https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/5401885.pdfIn PDF document text
- https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/54f4648b.pdfIn PDF document text
- https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/f6293.pdfIn PDF document text
- https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/7726582.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://uploads.strikinglycdn.com/files/30ddc679-82ba-4884-a0f0-f8e952a534e5/65611987214.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/9533f527-5474-4dae-ba94-a3c78b7b0236/12550859711.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0d6dc04a-75ae-4d23-9f14-90b36be6e28b/rawupetobux.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/67d7f2b5-d3b3-4a2a-a599-6cc599ac1ac0/14975113109.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/510e632a-d2f0-4ccd-8b63-0513623f0c3d/bukadasebupa.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0484/2363/3053/files/zazuzobipokiwuga.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0501/4709/8803/files/56911106591.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/6627/7534/files/76671001833.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0434/1907/4722/files/aftermath_2020_parents_guide.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0428/4488/1059/files/86930836644.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6b1ffd67-a16f-49ee-9dcc-ce33bf369e79/97581155279.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0883c87a-0633-4436-8d0a-79e9127c3ba8/20653925179.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/01b75dd8-8fdc-4412-be79-d8a8b8a788fb/5193195463.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0432/3259/2040/files/18503992349.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0479/3188/3676/files/zing-ci_leung_man-zeok_yen.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0504/7625/3375/files/19045736543.pdfIn PDF document text
- https://cdn.shopify.com/s/files/1/0503/6575/9675/files/irs_guidelines_mileage_reimbursement_2020.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_off0000888a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x888A	5036 bytes
SHA-256: `c6fcc5b0fee239aea66d18913a1d6e741fb4821cd27e2b21fbedfa13773ac347`
`font_01_sfnt_off000099ac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x99AC	11124 bytes
SHA-256: `b933a2f54530e47ade0575982589c4505821ac50f9290a761813a6105d5b54c8`
`font_02_sfnt_off0000be28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE28	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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