Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce28d3ed5f055d0…

MALICIOUS

PDF

54.8 KB Created: 2020-08-31 21:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7e52076358dbe0a2254a1867908a199a SHA-1: 56964ec7cedfe7b623ab66e06876e37fadbf0399 SHA-256: 4ce28d3ed5f055d0025cd25298b6d5215158566dda46023f41726497136163c1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=critical+ops+mod+apk+update'. This indicates the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. The presence of a PDF link farm heuristic further supports the malicious intent of distributing links. No scripts were extracted from this sample.

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/wix?keyword=critical+ops+mod+apk+update
    • https://cdn.shopify.com/s/files/1/0430/7792/7063/files/litivoragixadurov.pdf
    • https://cdn.shopify.com/s/files/1/0435/1868/9434/files/android_checkedtextview_color.pdf
    • https://cdn.shopify.com/s/files/1/0444/4153/4631/files/edpb_guidelines_on_certification.pdf
    • https://cdn.shopify.com/s/files/1/0435/5234/2184/files/daring_greatly_brene_brown_audiobook.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/doninn_audio_editor_apk_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c9e523034c3444dafbdfb705f38b5ef.pdf
    • https://static.usrfiles.com/ugd/80bfa9_a4fe2f134140447ea7f485f6998d74ee.pdf
    • https://static.usrfiles.com/ugd/b8c837_7110b50ea0214e948769cf9c5e3da20f.pdf
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/bharat_movie_songs_songspk.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8951/files/fufuvujojovuvifil.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00008df5.bin
4d5e7e3b022078069dd285ce32b03de412a21447442e4ca19b95124d155487e0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8DF5 28208 bytes
font_00_sfnt_off00005920.bin
ec00df702ba2030ad2b93c54d968d741f2ae8fc73ba777de63b74205eeae28bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5920 5080 bytes
font_01_sfnt_off00006a62.bin
dba5f105e44771ec8b3c16b4d1b4268938b40f6bed12bbd272c1ae94c2adbef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A62 10312 bytes
font_03_sfnt_off0000c022.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC022 4324 bytes

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