Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5fc2e717bb83bf…

MALICIOUS

PDF

56.6 KB Created: 2020-07-29 22:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3c9b64bb417b517bb53e62f8246f1f4 SHA-1: 4177c31f8f0b9510588530e7a6bf1dcca0c1dfcf SHA-256: 0d5fc2e717bb83bfcdf4c84b5e533f04b06ff3683409462c8cc1d957a08cfa0e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Apache Hadoop tutorial for beginners pdf'. The primary attack vector is likely to be users clicking on these links, leading them to malicious websites.

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=apache+hadoop+tutorial+for+beginners+pdf
    • http://files.bigdoglabradoodles.com/uploads/1/3/0/7/130739204/71e38221f.pdf
    • http://files.sno-puffsamoyeds.com/uploads/1/3/2/8/132815365/fowawotuf.pdf
    • http://files.fortykes.net/uploads/1/3/2/3/132302916/8116921.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/7245/2776/files/80873989456.pdf
    • https://cdn.shopify.com/s/files/1/0429/0219/2287/files/xugaleguxojomukumeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/72830587986.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/fevezatisopewewowikegol.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51098187394.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/23186026526.pdf
    • https://cdn.shopify.com/s/files/1/0437/2211/3173/files/vituvupapanerasarabut.pdf
    • https://cdn.shopify.com/s/files/1/0431/6125/6096/files/godizototadawuwamujuwijo.pdf
    • https://cdn.shopify.com/s/files/1/0427/9051/8940/files/nitoxolam.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_off00009f67.bin
c1e0e949f3d5f2bf402da5c970376d1864b047e8702ae390d6edab780f17eb1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F67 5428 bytes
font_01_sfnt_off0000b1ca.bin
a911bdaa7cfa17886538fbd6c05055b1a31b9c174c7d88d83d8f539531dff81b
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1CA 10384 bytes