Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3a1cf0f1e2b2ac…

MALICIOUS

PDF

34.5 KB Created: 2020-08-12 20:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64bc8baf01eb406c332e62d631372fa2 SHA-1: 261168038d1dbc025b16cefc62c7d892a101867e SHA-256: ea3a1cf0f1e2b2acf3e3941a911e9fb46a658146efefff2eab0da7fb23363538
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, specifically 'https://ttraff.cc/pify?keyword=nonlinear+functional+analysis+a+first+course+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious sites, likely for phishing or malware distribution.

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=nonlinear+functional+analysis+a+first+course+pdf
    • http://files.roymagnuson.org/uploads/1/3/1/6/131637814/japax-kokurogafo.pdf
    • http://files.portclintonattorney.com/uploads/1/3/0/7/130776158/dcddfa5.pdf
    • http://files.gameplayer.dk/uploads/1/3/1/4/131411688/1800786.pdf
    • http://files.womensvaad.com/uploads/1/3/2/7/132740463/vemidewu_pebux_tuzodebope_fonoguzemuwegi.pdf
    • http://files.portageresourceguide.com/uploads/1/3/1/6/131606644/8719065.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/rimworld_antigrain_warhead.pdf
    • https://cdn.shopify.com/s/files/1/0430/5112/2842/files/13076841289.pdf
    • https://cdn.shopify.com/s/files/1/0433/8761/7447/files/mogumudiketimabilonuda.pdf
    • https://cdn.shopify.com/s/files/1/0428/8842/9724/files/acrobat_reader_append.pdf
    • https://cdn.shopify.com/s/files/1/0429/9345/1159/files/the_buy_side_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/9766/7224/files/fojizadam.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/building_technology_text_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/97183777341.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/sda_church_hymnal_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/4223/4791/files/rakipesotuzolagalit.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_off000048b4.bin
6ba69eb404b6936a2d130e2a69762c909b1a31084fdd726eb7e7bd8e5421f4bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48B4 5220 bytes
font_01_sfnt_off00005a8d.bin
dda853b4ab9e3dbd07d2274efad9ac48f3a478b7e9f1f016f74662d8f4e8a02a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8D 10384 bytes

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