PDF malware analysis — malicious · 1a621f90e19e2605

MALICIOUS

PDF

43.1 KB Created: 2020-07-31 21:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 012c46be04c80303846fe07c65681a3f SHA-1: ccc2f2564e850fa9d22f84b6a07e12b2d9e6394b SHA-256: 1a621f90e19e2605105de21f77f9af51930523e45a698c07d18d0188b2355300

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting an attempt at SEO poisoning to drive traffic to malicious infrastructure. The primary heuristic firing indicates a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=css3+interview+questions+and+answers+pdf'. The document body, though heavily obfuscated, contains this URL and references technical content, reinforcing the lure. No scripts were extracted from this sample.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

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.
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/pify?keyword=css3+interview+questions+and+answers+pdf
- http://files.lindveit.com/uploads/1/3/0/8/130814245/a399215dc2.pdf
- http://files.neonopen.com/uploads/1/3/2/6/132682022/1237491.pdf
- http://files.kilsythcommunitychurch.com/uploads/1/3/2/8/132814071/zukux.pdf
- http://files.nextgenrugcleaning.com/uploads/1/3/0/7/130740522/masaweriligo.pdf
- https://cdn.shopify.com/s/files/1/0438/8506/8456/files/21068999652.pdf
- https://cdn.shopify.com/s/files/1/0429/8565/2375/files/mezigulusajoxewukideruwap.pdf
- https://cdn.shopify.com/s/files/1/0432/9121/3980/files/15322427591.pdf
- https://cdn.shopify.com/s/files/1/0433/2745/5382/files/87659233442.pdf
- https://cdn.shopify.com/s/files/1/0435/5470/1463/files/80022221679.pdf
- https://cdn.shopify.com/s/files/1/0434/5020/4327/files/kajefewekolisuse.pdf
- https://cdn.shopify.com/s/files/1/0429/4138/2812/files/zalubuna.pdf
- https://cdn.shopify.com/s/files/1/0431/8950/2110/files/28074402520.pdf
- https://cdn.shopify.com/s/files/1/0437/2915/8295/files/85405790858.pdf
- https://cdn.shopify.com/s/files/1/0427/9785/8972/files/9302435616.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasidobedibugamis.pdf
- https://cdn.shopify.com/s/files/1/0428/5313/8591/files/bebow.pdf
- https://cdn.shopify.com/s/files/1/0430/8615/1833/files/zomuminudujove.pdf
- https://cdn.shopify.com/s/files/1/0434/4066/8838/files/22778405466.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000685f.bin` `dd0d94db79f70a8227d24a2dc07e59fba7361efa729d3ab396c2960f78c48ad8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x685F	5348 bytes
`font_01_sfnt_off00007aaf.bin` `9fd56aa6143899c8f208abfc199be4bc6f3cdd939a97b51789167e221fab6abe`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7AAF	10724 bytes

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