Malicious PDF — malware analysis report

Static analysis result for SHA-256 573b8da4b6f36b03…

MALICIOUS

PDF

46.1 KB Created: 2020-09-03 04:58:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d63c9e09cf5fd9922f7ea7a2c05f3c9d SHA-1: 193137327281333e55e5731d4811d828b52940b7 SHA-256: 573b8da4b6f36b0370b9fab8fd090793f732ae0266921b96da9e990e45913335
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a known malicious redirector. The document body, though heavily obfuscated, contains the URL for the redirector, which is presented as a movie download link. This indicates a social engineering lure to drive traffic to malicious infrastructure.

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.club/wix?keyword=cheeni+kum+movie++filmywap
    • https://cdn.shopify.com/s/files/1/0439/3353/2315/files/pokemon_colosseum_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/1507/7022/files/attendant_list_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/google_dictionary_for_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0435/9671/0047/files/64768170216.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2221ff361a9486cbb9e7216a1bcb6bd.pdf
    • https://static.usrfiles.com/ugd/ef253e_3f115c0e1f0647b6b5b62a90b664edfe.pdf
    • https://static.usrfiles.com/ugd/8a9bcc_53ac947beb5d4313bd6b7c3538d858ee.pdf
    • https://static.usrfiles.com/ugd/9fc8c3_d50a68f0cafe4436b859a434e485c3cd.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6582/files/37943184515.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/81030640965.pdf
    • https://cdn.shopify.com/s/files/1/0433/7949/0968/files/74622225458.pdf
    • https://cdn.shopify.com/s/files/1/0434/1651/8805/files/dudabifeletovajamen.pdf
    • https://cdn.shopify.com/s/files/1/0435/6987/3054/files/egypt_pyramids_travel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/38974440288.pdf
    • https://cdn.shopify.com/s/files/1/0434/4286/4289/files/jegupan.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_off00006203.bin
312061382087bb9a69ef11470d03631e29677bb4c4f3961142a9c499ea909c89
pdf-font-stream PDF embedded font (sfnt) at offset 0x6203 5088 bytes
font_01_sfnt_off0000734b.bin
2b6fca20e722eb62889dc6821487a86e5c56a34a859789b64bd0c3a399dd6525
pdf-font-stream PDF embedded font (sfnt) at offset 0x734B 10128 bytes
font_02_sfnt_off0000964a.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x964A 16164 bytes