Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28b1d8d139b8ad5…

MALICIOUS

PDF

47.3 KB Created: 2020-09-13 12:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69f86769bfc940a102d4139fb1166678 SHA-1: 605a75f896e9500552e51217f5d00b6e1684e1fc SHA-256: e28b1d8d139b8ad5a2d9f152296e2056fd6e09637e1b14e8b5571afa14aedfb3
120 Risk Score

Malware Insights

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

The PDF contains a link disguised as a service manual, which redirects to a malicious URL. The PDF also exhibits characteristics of a link farm, with numerous embedded links pointing to various external resources, many of which are hosted on Shopify. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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.me/wix?keyword=echo+chainsaw+service+manual
    • http://files.katarplatformu.com/uploads/1/3/1/1/131164252/425d165d803.pdf
    • http://norododom.rdpresets.com/uploads/1/3/1/4/131407406/xekenod_gasab.pdf
    • http://files.bayareabluesdance.com/uploads/1/3/1/4/131437474/koxikolepa.pdf
    • http://files.2dskihorsemanship.com/uploads/1/3/2/7/132741225/siliwapogifor.pdf
    • http://femiluw.thesparkministries.com/uploads/1/3/0/8/130813765/ab79b14710b82.pdf
    • https://cdn.shopify.com/s/files/1/0437/5347/2151/files/gasimipofovojuro.pdf
    • https://cdn.shopify.com/s/files/1/0434/1596/1762/files/adapter_bluetooth_usb_android.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/rewibivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4103/8229/files/free_easy_piano_broadway_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46283819311.pdf
    • https://cdn.shopify.com/s/files/1/0439/0728/5147/files/gym_workout_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/0537/0791/files/74774851291.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_off00007b63.bin
48fc543d192c3e2537167e27357a911b3ab78de247636243d603cdb3948410e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B63 5148 bytes
font_01_sfnt_off00008cd8.bin
ae841337e59752021577cd090ebf58751253d883fec2fac93a98594754b9698e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD8 10524 bytes

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