PDF malware analysis — malicious · d6fb531f6f8bdc7d

MALICIOUS

PDF

53.7 KB Created: 2020-07-31 23:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 04e73a567b6748c8a314d4e7c4230711 SHA-1: d4be0277cffa71c3b1fae29d32433accd48f886d SHA-256: d6fb531f6f8bdc7dbb3a43b6915a92e3dbe313fbf0b3ea210b3bb340ed247bd5

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains references to 'pmbok 2016 pdf', suggesting a lure to disguise malicious intent. The presence of a link farm and the ML classifier's high confidence score further support the malicious classification. The primary attack vector appears to be directing users to malicious infrastructure via these links.

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.com/pify?keyword=pmbok+2016+pdf
- http://files.exact-timing.com/uploads/1/3/2/6/132696029/728673.pdf
- http://files.rachelwoodwardhansen.com/uploads/1/3/0/7/130775387/69673e63.pdf
- http://files.beitnachum.org/uploads/1/3/1/4/131483253/ximegigojepirez_rabisosip_suwupisi.pdf
- http://files.ruthnadiamassage.com/uploads/1/3/0/7/130740590/1737054.pdf
- http://files.roykillen.com/uploads/1/3/1/8/131860204/71269d79130648.pdf
- https://cdn.shopify.com/s/files/1/0431/5886/4028/files/41380618258.pdf
- https://cdn.shopify.com/s/files/1/0438/3119/7856/files/puwafuxebimexateza.pdf
- https://cdn.shopify.com/s/files/1/0430/4021/1105/files/31340845371.pdf
- https://cdn.shopify.com/s/files/1/0434/1301/2630/files/atherosclerosis_book_pdf.pdf
- https://cdn.shopify.com/s/files/1/0431/5286/7494/files/vasafizop.pdf
- https://cdn.shopify.com/s/files/1/0430/6875/2023/files/nolipaverosorugalafede.pdf
- https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ganisififado.pdf
- https://cdn.shopify.com/s/files/1/0431/5476/8021/files/wanibovaraponudesubogux.pdf
- https://cdn.shopify.com/s/files/1/0433/6310/6968/files/42704223080.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_005_off0000a077.bin` `471349a0b46ba3c8394f8364f4295e3b187ba9e406f6023b668fbca0a06fff36`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xA077	17420 bytes
`font_00_sfnt_off00006a7e.bin` `ffc00924815d5c2508b6622cc59ea34e7f6edc051d40674f593df2e6ae43cfbc`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6A7E	4792 bytes
`font_01_sfnt_off00007ac3.bin` `65cc0d7ae25baa6b451e9815f16b3c4a886d8eea41db77624eef0eb3857d6750`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7AC3	11116 bytes
`font_03_sfnt_off0000ba6b.bin` `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA6B	4324 bytes

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