Malicious PDF — malware analysis report

Static analysis result for SHA-256 464e7184ecc6e192…

MALICIOUS

PDF

47.2 KB Created: 2020-08-22 13:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c95637d4e1e108f748dd408b58846d4b SHA-1: 423b997d479b7cae19cbd20b53efc8e96b16fb04 SHA-256: 464e7184ecc6e1920cc73c359ab12a34b96d7001f7156b1194e3283f341ff23f
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://ttraff.com/pify?keyword=i+am+archer+mod+apk+android+1` is the primary indicator of this malicious behavior. The document body, though heavily obfuscated, also contains this URL, reinforcing its presence. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=i+am+archer+mod+apk+android+1
    • http://files.rochesterkino.co.uk/uploads/1/3/1/1/131164002/forixamewowipewuguwe.pdf
    • http://files.acomputerconsultant.com/uploads/1/3/0/9/130969511/3630881.pdf
    • http://pojijiwej.lilrenzo.com/uploads/1/3/0/9/130969191/titevev.pdf
    • https://cdn.shopify.com/s/files/1/0440/8741/0840/files/calendrier_2020_avec_semaine.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/digital_electronics_bangla_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5079/files/81336979505.pdf
    • https://cdn.shopify.com/s/files/1/0439/2353/8088/files/tefubibosidizoti.pdf
    • https://cdn.shopify.com/s/files/1/0439/7678/6078/files/zedinijinifepolilosenunor.pdf
    • https://cdn.shopify.com/s/files/1/0436/2466/1154/files/34748851875.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/71279016894.pdf
    • https://cdn.shopify.com/s/files/1/0430/5725/0455/files/migukesipalukere.pdf
    • https://cdn.shopify.com/s/files/1/0432/1692/8923/files/malayalam_kambi_kadakal.pdf
    • https://cdn.shopify.com/s/files/1/0429/9387/7145/files/85824979483.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_off00005af5.bin
aff11289bf87f92bc53c0e2abc335208e29b6db8a954e82fd0a5595ffa95d344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF5 2880 bytes
font_01_sfnt_off00006533.bin
d7f760e7d8d64ee57bb399cb0b9f06d34480808a7dfa513fbf2cb4954e01bcba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6533 5156 bytes
font_02_sfnt_off00007694.bin
c39936897151f37ac80ab028efbfd30c8562139a176d156abb66c10fa8e0a23a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7694 10480 bytes
font_03_sfnt_off00009aad.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AAD 16092 bytes

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