PDF malware analysis — malicious · 920f86eb0d1faa8b

MALICIOUS

PDF

40.1 KB Created: 2020-08-14 01:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 06002681bcb3fb95777970ad2d0b2193 SHA-1: 6e1af98f584f35fe1367edabe8466bd1cf61c336 SHA-256: 920f86eb0d1faa8b3f549edcfd3757c65d040b4170e0db0656c65381d7b79e9d

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a significant number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a link to a known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=dslr+basic+guide'. The document body contains garbled text and metadata indicating it was generated by wkhtmltopdf, suggesting it's not a legitimate document. The primary attack pattern appears to be the distribution of a large number of links, potentially to manipulate search engine results or to lead users to malicious sites.

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.cc/pify?keyword=dslr+basic+guide
- http://files.benobadia.com/uploads/1/3/1/8/131871677/5952892.pdf
- http://budipusi.kaybethavery.com/uploads/1/3/1/0/131071164/ziwakug_gakofebavomid_difawinigo_basaterodakorof.pdf
- http://kesumaf.bassriver-nj.org/uploads/1/3/1/4/131453850/sijisudajenado-rubam-gidorodanodarav.pdf
- http://vosufogi.bleststudio.com/uploads/1/3/0/7/130775511/wesukakez_mafal_juxavix.pdf
- https://cdn.shopify.com/s/files/1/0433/0032/3478/files/movugarikinodejexefil.pdf
- https://cdn.shopify.com/s/files/1/0429/3902/3526/files/ring_of_visibility_osrs.pdf
- https://cdn.shopify.com/s/files/1/0429/6186/2810/files/88577018253.pdf
- https://cdn.shopify.com/s/files/1/0430/3798/2869/files/xebufe.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85450973079.pdf
- https://cdn.shopify.com/s/files/1/0432/0670/5311/files/rifavanijizazol.pdf
- https://cdn.shopify.com/s/files/1/0435/8144/0168/files/43242355727.pdf
- https://cdn.shopify.com/s/files/1/0438/8998/3640/files/monufowexixotazokotokoxig.pdf
- https://cdn.shopify.com/s/files/1/0432/4743/5940/files/12036460124.pdf
- https://cdn.shopify.com/s/files/1/0427/4244/8295/files/93534093247.pdf
- https://cdn.shopify.com/s/files/1/0434/8005/5958/files/zumesogak.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_off00005e61.bin` `140b05cabc2d4894c225291b8f24a10c5e318c42302a96e95065313e24d864e4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5E61	5248 bytes
`font_01_sfnt_off00007035.bin` `682fdf9a697fb9bc73423441018a6d2deef9408c0bdbb5b63bc760dd3eabfad5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7035	10592 bytes

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