Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b2db4b3a4d3dc3…

MALICIOUS

PDF

54.9 KB Created: 2020-08-10 08:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68d0c9c5a115373d2242152e283384a7 SHA-1: a879e7347355e73f1d2f61928bdc15e958d800a9 SHA-256: b8b2db4b3a4d3dc3a703be5ffde0470d34b43f574e7adf6e0daa8bea1df38d5b
120 Risk Score

Malware Insights

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

The PDF document was identified as malicious due to its inclusion of a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the URL that likely serves as the lure. No scripts were extracted from this sample, limiting further analysis of its behavior.

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.com/pify?keyword=addis+ababa+university+pdf
    • http://files.casapasofino.com/uploads/1/3/1/1/131164100/4618394.pdf
    • http://files.jwhitneyart.com/uploads/1/3/1/3/131384127/32306b867c554bf.pdf
    • http://files.yourownfm.com/uploads/1/3/2/8/132815753/xexuko-wibejivolef-fujuminigukof.pdf
    • http://najuduwiv.westmoorplace.com/uploads/1/3/0/9/130969723/3932616.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/51386976831.pdf
    • https://cdn.shopify.com/s/files/1/0433/8332/4822/files/kubota_b7100_hst.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/cache_memory_mapping_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/0358/4423/files/1092334116.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6261/files/mcanisme_d_accouchement_normal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1606/0061/files/agriculture_in_tamilnadu_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0430/4722/3458/files/74039245486.pdf
    • https://cdn.shopify.com/s/files/1/0434/5341/5576/files/65756692045.pdf
    • https://cdn.shopify.com/s/files/1/0432/4022/6984/files/75716197277.pdf
    • https://cdn.shopify.com/s/files/1/0437/6831/6055/files/sexejodukow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/97847229230.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6839/files/jodunezolinimafokumakutif.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_off00006dda.bin
9e56470661036a46d521b0e9fb0bce7aaf8887e4feed2f1b7c63a685e235f37a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDA 16436 bytes
font_01_sfnt_off000098b3.bin
0ed920b266c76e8416e54013cd0d74ba3663d011fa24750ffd25dd2e4528d5d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x98B3 5292 bytes
font_02_sfnt_off0000aac9.bin
84e2f53cdc4c46dcab9aa3a0622db17994238c03dc54978326468e180bc48be3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAAC9 10360 bytes