Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d50007132386d8…

MALICIOUS

PDF

51.6 KB Created: 2020-08-21 23:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 095b33ac99a60f3e3dd0289434cf54af SHA-1: ba0132289b14bb0ed9b8b39f06c1f29581b8fdbc SHA-256: e6d50007132386d8560b914cacf65b746f509d74d1781b42f32b5be9efa36fb4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a prominent link that redirects to a malicious URL, disguised as a free download for '3d tuning free for android'. This indicates a phishing or social engineering attack aimed at tricking users into visiting a compromised site. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the embedded URL and the heuristic firings are sufficient to determine the attack pattern.

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/pify?keyword=3d+tuning+free++for+android
    • http://nonapopeg.kincardinecheetahs.ca/uploads/1/3/2/7/132710780/3011982.pdf
    • http://files.floridaaquaticbiologists.org/uploads/1/3/1/3/131398250/6480983.pdf
    • http://wotenulug.placercountyreviewagency.com/uploads/1/3/1/6/131636733/jiruxus.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/50926102397.pdf
    • https://cdn.shopify.com/s/files/1/0432/8102/3132/files/mibizezekej.pdf
    • https://cdn.shopify.com/s/files/1/0459/8978/9853/files/master_p_bourbons_and_lacs.pdf
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/77858911636.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/miwojulexisopodoluwug.pdf
    • https://cdn.shopify.com/s/files/1/0440/3278/6597/files/autism_society_of_the_philippines_membership_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/c_array_initialization.pdf
    • https://cdn.shopify.com/s/files/1/0454/8493/3272/files/fobanelelogux.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/nuxidotudel.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/763527406.pdf
    • https://cdn.shopify.com/s/files/1/0433/7654/1857/files/wapking_a_to_z_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/61697026267.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
font_00_sfnt_off00005f5c.bin
b80f20edf6348233377aaf60922ef5e91de25a335e4ad55e14b5bab9cdfc0265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5C 10172 bytes
font_01_sfnt_off000080ac.bin
f2020536453da60f12bb89e0875cade4b449800b82a9fc71541a4aa05f057afa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80AC 4816 bytes
font_02_sfnt_off0000910c.bin
a63a0d9fd6f57cd3e75a55f76117acd0fb63a5e1ff200ccc3fba29462adaf7b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x910C 10008 bytes
font_03_sfnt_off0000b342.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB342 4324 bytes

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