Malicious PDF — malware analysis report

Static analysis result for SHA-256 6038f170fec96683…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 18:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51f162fe570d3d892df17fa530982f75 SHA-1: fb997eab21db096415e3b34f553f38e65d5c1464 SHA-256: 6038f170fec96683c438eeb0653a4b37da3dc57d968a38329c30ee5be7909404
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm infrastructure. One of the primary links directs to a known malicious redirector, suggesting an attempt to lure users to malicious websites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=edf+tempo+couleur+jour
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/c5d40f_81f3325a5f284a678e1fa2342db5eeca.pdf
    • https://static.usrfiles.com/ugd/b8c837_f71b5057ffa44e138626de63a8734e41.pdf
    • https://static.usrfiles.com/ugd/b8c837_666dccc875de4a9b890f7e5c2c0f4a59.pdf
    • https://static.usrfiles.com/ugd/18f527_2b54860753d4402f94d757af94666fcc.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9014f6f1a234e708e17ecb817c429d1.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/86385147676.pdf
    • https://cdn.shopify.com/s/files/1/0440/6863/4789/files/car_care_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdf
    • https://cdn.shopify.com/s/files/1/0434/5485/7369/files/sisijumuza.pdf
    • https://cdn.shopify.com/s/files/1/0432/6762/1028/files/tapiwibopovoviwuxowodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8391/4654/files/tufoxikogerabufifaleruf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8664/files/66070884649.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/somotapefovib.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45598155969.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/raxemupetoboxokugilizos.pdf
    • https://static.usrfiles.com/ugd/b8c837_37c0672c55984546a209a1b2c222cf94.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_206e8fbb45824fd2bdaf43afce0d3864.pdf
    • https://static.usrfiles.com/ugd/b8c837_882974bfd91d4483abc4bc256aa23e76.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b5dc8a808694101a998a10af16fb305.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c308b80a8334f6cbbac0840859dd934.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000618f.bin
82da7e70b8cd76ddabf88ca0ea3efab9b0dfeaa1f50c3219fd3fc87cb7f675f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x618F 4948 bytes
font_01_sfnt_off00007253.bin
70468f2604ec3cfff338e989ca074f35ebd94087e1a5c0758b06261f283d529f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7253 11892 bytes

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