Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cdd75356e092390…

MALICIOUS

PDF

109.0 KB Created: 2020-08-31 20:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0feedebfb5c154ccf5e64377d9db3a0 SHA-1: 60f7acb27b1ff285ac470097c68e95e2529e63b8 SHA-256: 9cdd75356e0923901b5896d4114450ede7dc84e29ac2bf27ec6595b056b78f90
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=africa+countries+list+pdf', suggesting a lure to a phishing or scam page. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=africa+countries+list+pdf
    • https://static.usrfiles.com/ugd/3dd68e_32fc52d8178741c98756bd11b83ef48f.pdf
    • https://static.usrfiles.com/ugd/b8c837_595645a606b9452192fa9041e802d36b.pdf
    • https://static.usrfiles.com/ugd/64d889_e7757fbf591d4843b225d9b09f4b2e66.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc9f5a679e1948a0bc660624708cd1f4.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4967/files/liguwazexumuxa.pdf
    • https://static.usrfiles.com/ugd/b8c837_0245d85302864602adc688fc82eaa745.pdf
    • https://static.usrfiles.com/ugd/b8c837_311f7dd521204dd58dfe8bf5f63acd8d.pdf
    • https://static.usrfiles.com/ugd/fb5067_1c75ce34d6264aaea4035ddc2530ac74.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/poe_ziggyd_profile.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/86904082297.pdf
    • https://cdn.shopify.com/s/files/1/0437/8876/3298/files/list_of_german_nouns_with_gender.pdf
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/south_african_national_anthem_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/5973/9814/files/19983937378.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00017683.bin
b3c1f2bedeb64c221eb36b9c11ba80c78f9b35630c63e9b4265f74814187538a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17683 25220 bytes
font_00_sfnt_off0000fffb.bin
a279245eda198c260a6a352b9f6ff7bc87380df45ecee228154af71ccc3aad92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFB 16292 bytes
font_01_sfnt_off00012bce.bin
81ace495ee7f7f4f52d2b38030c93c46ba8c3c72e7de6438431da35b98bbe35f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCE 5140 bytes
font_02_sfnt_off00013d5b.bin
90c1f24a92fb15b1afece95289aeeead9fb88cd6c42ae8581c13ebb53b502bde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5B 19284 bytes

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