Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c1ccebe73305112…

MALICIOUS

PDF

47.4 KB Created: 2020-09-06 16:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bcf871ae9cdd79fb68fc7fab2597435 SHA-1: dd8d2d94210ad5a2ff5cbc3a8005c6d1b0842bae SHA-256: 0c1ccebe73305112d88bdf30bb9d2709c72d3f088f7b71f294c5e5d4021b1979
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector that promises a 'free fire diamond generator app'. This is a common lure for phishing or scamming users. The PDF also contains a large number of external links, suggesting it is part of a link farm designed to improve search engine ranking for malicious content. The ML classifier strongly indicates 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.me/wix?keyword=free+fire+diamond+generator+app
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/55f640_1e4e58e2153d4647b1d45e837647fa5b.pdf
    • https://static.usrfiles.com/ugd/432b07_6d427c9f9f5f48e187f1c3b50cc78931.pdf
    • https://static.usrfiles.com/ugd/3254bf_5150e2225c7b49738da51d7d1de94980.pdf
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/51325992959.pdf
    • https://cdn.shopify.com/s/files/1/0450/0963/3444/files/printable_laundry_symbols.pdf
    • https://static.usrfiles.com/ugd/afbef4_69a22a58d4b54a208d301e3e2d5119c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a9a1909134c4d16a35597919a719707.pdf
    • https://static.usrfiles.com/ugd/536122_8a517f94e9714ee5bbaab7badf63efc6.pdf
    • https://static.usrfiles.com/ugd/538d67_385f79d2a77a42af9f63350c346a754f.pdf
    • https://static.usrfiles.com/ugd/74e905_e8e71c1fbe0a40e1bc2081468b643f45.pdf
    • https://cdn.shopify.com/s/files/1/0433/8017/9095/files/realtek_error_code_0001.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1585/files/butilokusixifamelogif.pdf
    • https://cdn.shopify.com/s/files/1/0439/1839/3499/files/live_chat_app_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/poe_oni_goroshi_farming_guide.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_off00007aa2.bin
192dc57ab5b4060e23e570df50938eec98102cb9cab49549bd580d41ee8b6fb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA2 5104 bytes
font_01_sfnt_off00008bf0.bin
af6534d7541f7a516e42524d989bfefe1d9e3fdb3c8276aeed282e6822add2f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF0 10712 bytes