Malicious PDF — malware analysis report

Static analysis result for SHA-256 828da071bdf22800…

MALICIOUS

PDF

37.2 KB Created: 2020-09-20 21:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a94b741c5ee81432ab3110394817d89f SHA-1: dcd908a59a8f9f981fcc2201631b85fc290932c9 SHA-256: 828da071bdf22800304d97b3f18942f00e520fac4cea36b62c8609c73be0e3ce
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple critical heuristics for containing a malicious redirector link and a large link farm. The embedded URLs, particularly the one pointing to 'ttraff.link', suggest an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure itself is indicative of a phishing or redirection attack.

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.link/wix?keyword=benjamin+d+foulois+middle+school
    • http://files.maddiecookcommunications.com/uploads/1/3/0/7/130738951/4948940.pdf
    • http://fufonok.maffaainc.com/uploads/1/3/1/3/131380429/sewipoledapuf_gogimigidil_razapokunoj.pdf
    • http://rotiwo.giltnercustomer.com/uploads/1/3/0/8/130874575/998272.pdf
    • http://files.michellexiao.net/uploads/1/3/1/6/131607346/xugex-xotosuzunixovir-kuvareduxifo-fufetatarifu.pdf
    • https://ebf273f1-6a43-4db3-9de8-0778f5ba458c.filesusr.com/ugd/4fea5c_5103e19702994c7daccc96963c80dd34.pdf?index=true
    • https://86e3dc50-232e-459d-bb98-cbf23d546b64.filesusr.com/ugd/9dda13_40307e36288e4cb38a46e2cc3763eb5a.pdf?index=true
    • https://6f7ab86a-78eb-4dff-8167-7f20f7dd61b2.filesusr.com/ugd/838e7e_e5fc8debc4054166af8425505bb1e661.pdf?index=true
    • https://3cab2f7b-f27c-418a-b635-4c3d0ae7123a.filesusr.com/ugd/b6aaa0_1420a3794d8040579af350c021234f80.pdf?index=true
    • https://e36f0e58-05f9-49b4-8b3b-e67a8a242df8.filesusr.com/ugd/94e5ef_8b99ca36cb504fb6b820c7237553393b.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0440/7836/6872/files/89399730273.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0969/files/balloon_shooter_game_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/5213/7625/files/lake_erie_ice_cover.pdf
    • https://cdn.shopify.com/s/files/1/0430/4096/4759/files/ritufatumale.pdf
    • https://cdn.shopify.com/s/files/1/0436/2685/6610/files/1920x1080_black_wallpaper_android.pdf
    • https://cdn.shopify.com/s/files/1/0462/6835/0626/files/nupim.pdf
    • https://cdn.shopify.com/s/files/1/0484/4306/4474/files/show_box_apk_download_iphone.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.

FilenameKindSourceSize
font_00_sfnt_off0000523e.bin
1cf9231b303544bb9e332b3559e92aedc733aa540e977357598dec7636955ce3
pdf-font-stream PDF embedded font (sfnt) at offset 0x523E 5288 bytes
font_01_sfnt_off00006420.bin
fe6dbfbe3dce14063dfc27b2bc2f06300426b2342b065b3ed879828ed9f2fe19
pdf-font-stream PDF embedded font (sfnt) at offset 0x6420 10432 bytes