Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a70b5abad39046…

MALICIOUS

PDF

50.7 KB Created: 2020-08-23 05:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31f9e04b1f8e5f87808915accd779840 SHA-1: 1aebc4e9639e36ec86575c38cdb2ee81f9dc8eef SHA-256: 44a70b5abad39046e0e629be34e9f5651e50b67ab0e3d26cb0288439c70fd51f
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, contains text suggesting a lure related to an 'answer key' and a 'download' button. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The file is classified as a malicious redirector due to its structure and the presence of a known malicious link.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=tgt+sanskrit+answer+key+2016
    • http://files.xuluprophet.com/uploads/1/3/1/4/131437307/362989.pdf
    • http://files.goodshepherdgratz.com/uploads/1/3/0/9/130969075/miratov-kekezoxagomaga-jebejuwovosive.pdf
    • http://files.ironbridge-analytics.com/uploads/1/3/1/6/131606730/8974769.pdf
    • http://files.imhafiz.com/uploads/1/3/0/8/130814421/ropiri_zewolibewis_legitoxiga.pdf
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/75753257169.pdf
    • https://cdn.shopify.com/s/files/1/0457/6752/4518/files/veviremugejumerimawokape.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/56747972119.pdf
    • https://cdn.shopify.com/s/files/1/0440/7237/0326/files/agustin_barrios_mangore_la_catedral.pdf
    • https://cdn.shopify.com/s/files/1/0435/1416/7450/files/string_to_hex_python.pdf
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/93540268801.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/pozatoraxifo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8647/8489/files/ejemplo_de_acta_constitutiva_de_un_restaurante.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0617/files/2267442391.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/43762337802.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b04.bin
e3b44493fdf90470d8eae8fce94a786bad6df636ac9d5ec6e64f832bb585aa63
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B04 5188 bytes
font_01_sfnt_off00007ccf.bin
eee108464e7006ddf3a5cb7732ac3ecf4516607f11dd911945b450a9c3c75916
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCF 16680 bytes
font_02_sfnt_off0000afbe.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAFBE 4324 bytes