Malicious PDF — malware analysis report

Static analysis result for SHA-256 e125e07b155d97b4…

MALICIOUS

PDF

43.8 KB Created: 2020-08-18 21:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42f6a9af6665add2958d94bbeb9c2276 SHA-1: 2caed80b54b6dfea6ef33b789f04b850865c3dcc SHA-256: e125e07b155d97b41c65e2a66eb38e7404c8c2547a04cd500cc73a8c2c4f5984
120 Risk Score

Malware Insights

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

The PDF file contains a mass link farm, with many links pointing to Shopify domains, but one critical link redirects to a known malicious domain. The document body, though heavily obfuscated, contains the text "R data analysis tutorial pdf" and the malicious redirector URL, indicating a lure to a malicious site. The presence of numerous external links suggests a SEO-based spam campaign.

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=r+data+analysis+tutorial+pdf
    • http://files.crystalblueocean.com/uploads/1/3/0/7/130776481/408bee3be1e110.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ruwofejimu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3001/8210/files/rizegisikevezudefeperu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7908/9824/files/jewevipapafafamufub.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6941/files/xavonux.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/57013293877.pdf
    • https://cdn.shopify.com/s/files/1/0433/4406/8773/files/vodibasorugapuwe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0340/files/sajawozowagudawaxajafuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/gap_kids_size_chart.pdf
    • https://cdn.shopify.com/s/files/1/0428/1391/5303/files/gatawitudikoxinopekipe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6835/8807/files/87092666696.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3363/files/24110799225.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/belief_in_a_just_world_scale.pdf
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/rezetek.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_off00006e71.bin
666690a007be21e5f4a60f914a8ab22fe4b216d33d46868ad441106252310b38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E71 5144 bytes
font_01_sfnt_off00008011.bin
ae10326eacd9674b92c5bd17b2957fcf50e09eb95eb73ef7cc1fc452c1009a60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8011 10224 bytes

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