PDF malware analysis — malicious · b3a9d4a438f19694

MALICIOUS

PDF

44.5 KB Created: 2020-09-02 06:05:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: b4af08294100d1a3ebba42697205ccd2 SHA-1: e696a2abdc06209af32bc0e1e83ff226be5fa70c SHA-256: b3a9d4a438f19694cac8a16df4a1007b95e868305ee189296482e4f724f55ffb

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/wix?keyword=nccn+guidelines+for+febrile+neutropenia+2013`. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The ML classifier also strongly flagged this PDF as malicious. 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/wix?keyword=nccn+guidelines+for+febrile+neutropenia+2013
- https://static.usrfiles.com/ugd/5899d5_d92bbf935c4645e3aab38c94bc750896.pdf
- https://static.usrfiles.com/ugd/08fe48_1c052e08acbb46d3bcf5e68df0e166a0.pdf
- https://static.usrfiles.com/ugd/0511f5_fc61e6197f6d4c84a8526d91e13a1635.pdf
- https://static.usrfiles.com/ugd/b8c837_08e756bc544b49d0911562dc1fd8912a.pdf
- https://static.usrfiles.com/ugd/c0b427_b0ddcf4567184c3895910e97bdd00d4d.pdf
- https://static.usrfiles.com/ugd/2e79a6_0e4864361e4f4dcd90aa89d5f6924fe9.pdf
- https://cdn.shopify.com/s/files/1/0433/7162/6652/files/54759413886.pdf
- https://cdn.shopify.com/s/files/1/0436/4333/8912/files/penovaxonezudi.pdf
- https://cdn.shopify.com/s/files/1/0429/7857/4490/files/88771456584.pdf
- https://cdn.shopify.com/s/files/1/0437/7945/7175/files/visufogewojuwakasovikesu.pdf
- https://cdn.shopify.com/s/files/1/0457/4923/9964/files/rutazemoramo.pdf
- https://cdn.shopify.com/s/files/1/0463/6891/5617/files/sanjay_dutt_biography.pdf
- https://cdn.shopify.com/s/files/1/0432/1135/8372/files/duvadofapuxurimome.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/
- https://cdn.shopify.com/s/files/1/0436/4333/8912/files/penovaxonezud

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006e1b.bin` `1c997cdff4ed251dc8a0961bf0be8041ed9d0e53f3bd3f5891ee48906971cf38`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6E1B	5924 bytes
`font_01_sfnt_off0000825b.bin` `8399dae24cc9265b855b8236a7f80b1d913094b84afaf60c604b53598e7aac2d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x825B	10112 bytes

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