PDF malware analysis — malicious · 681a18c63a4437c9

MALICIOUS

PDF

50.1 KB Created: 2020-07-24 21:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: e5ea09c89ab8774cb0c0e504a1a605c0 SHA-1: ee00cf07498a4278745abbaab5b36e3442de8301 SHA-256: 681a18c63a4437c97dfe419e01e12dd4c89916c799f3858154003958c7698d49

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the presence of numerous links suggests an attempt to lure the user to external sites, likely for phishing or to download further malicious content.

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.cc/pify?keyword=boarding+gate+2007
- http://files.jmmlewis.com/uploads/1/3/0/7/130775729/devogalegejijenamoje.pdf
- http://files.merrifieldseminar.com/uploads/1/3/2/7/132710655/7749287.pdf
- http://files.brackloonns.com/uploads/1/3/0/7/130775511/9545435.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://cdn.shopify.com/s/files/1/0428/4448/7836/files/39257602387.pdf
- https://cdn.shopify.com/s/files/1/0434/9421/1750/files/xafulawifazosiga.pdf
- https://cdn.shopify.com/s/files/1/0433/1234/9334/files/56607177077.pdf
- https://cdn.shopify.com/s/files/1/0430/2969/2577/files/13096811592.pdf
- https://cdn.shopify.com/s/files/1/0429/3240/4380/files/zijesobofurasiwod.pdf
- https://cdn.shopify.com/s/files/1/0434/3640/8982/files/30806378442.pdf
- https://cdn.shopify.com/s/files/1/0440/2610/1910/files/ruvebubusunevegiv.pdf
- https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lajuvifubukakevo.pdf
- https://cdn.shopify.com/s/files/1/0431/9281/1681/files/90586002558.pdf
- https://cdn.shopify.com/s/files/1/0433/0346/9221/files/74197544235.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/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000879e.bin` `afcaeb159a1989e9db9e99334ffaea2c3fc26c3bef137b30c709e0b45dba4827`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x879E	4972 bytes
`font_01_sfnt_off0000988f.bin` `1dbed757987ade5c33803405c024fd82cc353d6a5ec0b9c6d5474c6f1d128502`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x988F	10236 bytes

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