Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6977a6055d99bca…

MALICIOUS

PDF

51.6 KB Created: 2020-08-09 11:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e17af61f17d8d724ba4490716f3897c SHA-1: e851f4caadacc340d542d0fadaf3b026ecd4871c SHA-256: b6977a6055d99bca331f90cb10fe84f1fcf30612b53a6e894b310dbf67d2d47a
180 Risk Score

Malware Insights

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

The PDF document is designed as a lure, using the guise of 'Android studio installation steps' to trick users into clicking a malicious link. This link, https://ttraff.com/pify?keyword=android+studio+installation+steps+pdf, redirects to a PDF link farm hosted on Shopify, which contains numerous links to other PDFs. The document also contains a heuristic firing for requesting recovery secrets, indicating a potential credential harvesting attempt.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=android+studio+installation+steps+pdf
    • http://files.aimbehavioralhealth.org/uploads/1/3/2/6/132695932/534df.pdf
    • http://files.tchaikovskiana.com/uploads/1/3/0/8/130874566/fodatoziwonunitaw.pdf
    • http://files.stlukepec.org/uploads/1/3/1/3/131381540/2ffee46a2267fca.pdf
    • https://cdn.shopify.com/s/files/1/0435/6997/1363/files/infectious_bronchitis_in_poultry.pdf
    • https://cdn.shopify.com/s/files/1/0428/8570/9987/files/rodaxekaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/naworosoxenitukunaxagon.pdf
    • https://cdn.shopify.com/s/files/1/0434/4309/3660/files/double_entry_accounting_system.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0798/files/7886488675.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5142/files/33155126840.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3899/files/52429132473.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/19276905720.pdf
    • https://cdn.shopify.com/s/files/1/0430/2720/2205/files/bunezikupolevafivepo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3222/files/xorasunomanok.pdf
    • https://cdn.shopify.com/s/files/1/0428/2292/6492/files/lineare_gleichungen_lsen_bungen.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_off00007edf.bin
eae81d4302014fdd684a622b24e53ac4e36d877a2d42586e7afdb9d0d4499310
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EDF 4908 bytes
font_01_sfnt_off00008f96.bin
3c7d596848e66640cc501822ea12ef70bd7cd7ff7078ebb3a46a07e8e2f31bbb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F96 10312 bytes
font_02_sfnt_off0000b2dc.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2DC 4324 bytes