Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4048e34a289c58…

MALICIOUS

PDF

33.6 KB Created: 2020-08-09 12:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 986a96fd8ce5723c04cb88f2106aecd1 SHA-1: e4c36869db24090e520972556256485eb8bd5860 SHA-256: ee4048e34a289c58867f1c7d9daea56ab8f67ff128b54dc94ca8afbafd97eaff
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, disguised as a textbook solution manual. The primary malicious link is https://ttraff.ru/pify?keyword=atkins+physical+chemistry+9th+edition+student+solution+manual+pdf. The document body is heavily obfuscated, but the presence of the malicious link and the heuristic firings strongly indicate a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=atkins+physical+chemistry+9th+edition+student+solution+manual+pdf
    • http://files.densityanalytics.com/uploads/1/3/0/8/130814769/57a960d0c0.pdf
    • http://files.morphettvalecatholic.com/uploads/1/3/0/7/130775644/teramemor_ziminibiban_mevuviwemasebaf_wipotopiruvup.pdf
    • http://files.rocktherobot.net/uploads/1/3/1/0/131070115/1863803.pdf
    • http://files.davaocityproperties.com/uploads/1/3/1/4/131409309/jilubigat.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7283/files/belajar_gitar_klasik.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8509/files/sovibusivupazowugek.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/spoken_english_notes_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3779/files/60976958637.pdf
    • https://cdn.shopify.com/s/files/1/0437/4387/1127/files/zitepuzexu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0390/3127/files/67022721151.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/21134395890.pdf
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/23491964163.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/ruxolajewebo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3457/3991/files/14851769496.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/midegatiwodamowajojolepol.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/gebuvadomukabulu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000455d.bin
10cea74be1ee0f98667fa311a949ca6ccd07e430a2673b4d5422d7d4a8a71011		 pdf-font-stream PDF embedded font (sfnt) at offset 0x455D 5704 bytes
font_01_sfnt_off000058ac.bin
7c9b4eaa9b58419aafc52594330d932c757b12c4155152fb9d37a2b2b6bde510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58AC 9416 bytes

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