Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2016e5cee5abb6a…

MALICIOUS

PDF

45.7 KB Created: 2020-08-21 19:42:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6dc699242e432efcc0f58258f03b0622 SHA-1: 189148b91d9c02773eaa649b14d784aec213f130 SHA-256: c2016e5cee5abb6a61348850a8b9e8eca598ba827fac4d7c62b86dba87c34fab
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though partially corrupted, contains text related to 'Patterns and symmetry worksheets for grade 3' and a URL pointing to a known malicious redirector. This suggests a social engineering attempt to lure users to malicious content, likely for further exploitation or malware delivery.

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.ru/pify?keyword=patterns+and+symmetry+worksheets+for+grade+3
    • http://files.cribnotespublications.com/uploads/1/3/1/3/131384127/4726608.pdf
    • https://cdn.shopify.com/s/files/1/0445/5186/4484/files/71316299430.pdf
    • https://cdn.shopify.com/s/files/1/0434/1966/4541/files/labutifumedosurematutiki.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/28658475371.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/definition_of_conflict_management.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/34780942016.pdf
    • https://cdn.shopify.com/s/files/1/0439/5650/2686/files/bimetallic_strip.pdf
    • https://cdn.shopify.com/s/files/1/0437/6949/5713/files/biological_control_of_pests_and_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0432/7617/3472/files/99122599527.pdf
    • https://cdn.shopify.com/s/files/1/0440/0077/2246/files/the_art_of_travel_alain_de_botton_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/5068/0991/files/fall_out_boy_ring_tone.pdf
    • https://cdn.shopify.com/s/files/1/0434/9001/7430/files/apple_music_family_sharing_iphone_and_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96951977507.pdf
    • https://cdn.shopify.com/s/files/1/0430/0632/8995/files/lebimuxek.pdf
    • https://cdn.shopify.com/s/files/1/0463/7822/1729/files/dieta_atkins_italiano.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f6.bin
0db1f01f0be4fa10f6c898518d98180be4352ff4062e9c26ad985273072e1f3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x66F6 5452 bytes
font_01_sfnt_off0000796a.bin
24c159e38cdce16f722e622338695c84dcbb1696035ad1d9f7958ef0acbbd876
pdf-font-stream PDF embedded font (sfnt) at offset 0x796A 10072 bytes
font_02_sfnt_off00009bba.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BBA 4324 bytes