Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f3f894d1821202…

MALICIOUS

PDF

39.2 KB Created: 2020-09-01 09:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcb503774f0f208efefe0c733f13e7d3 SHA-1: d78960ec47b7008f8b4acf1da9ae80eaef54c66a SHA-256: 64f3f894d18212029c63ec3c8cb6ca3581605507b24ba33ca5b817882353f91d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to a URL related to 'mirae asset midcap fund performance'. This suggests a phishing or scam attempt disguised as financial information. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to benign Shopify domains, but the primary malicious URL is the redirector.

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.link/wix?keyword=mirae+asset+midcap+fund+performance
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0452/3291/4592/files/basic_life_support_provider_manual_aha.pdf
    • https://cdn.shopify.com/s/files/1/0435/9471/1203/files/swiftkey_emojis_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/98712228.pdf
    • https://cdn.shopify.com/s/files/1/0434/0393/5911/files/wudumoxoviwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/sony_str-_dh130_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/list_of_arabic_nouns.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/malinconia_bellini.pdf
    • https://cdn.shopify.com/s/files/1/0437/8047/2984/files/10359216266.pdf
    • https://cdn.shopify.com/s/files/1/0436/1116/0738/files/lesepegetemibo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6749/0975/files/lukufuruvereleda.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/78993745682.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8216c9bf4324cf5874bee636da1fb24.pdf
    • https://static.usrfiles.com/ugd/345929_cd93101087aa4420b9699f6b1767efa4.pdf
    • https://static.usrfiles.com/ugd/6203b9_8d85fbbd332b49f29784ebc02e207245.pdf
    • https://static.usrfiles.com/ugd/5b604d_0b1f09d777aa476da425c88db57a974a.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_off0000588a.bin
7141970f4b95d5fc83d4f0de7294d54f99dd42c5d06be6373b2c19d8ff44c1ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x588A 5276 bytes
font_01_sfnt_off00006a6d.bin
715d48304402263dbf0af31b95c26999c2fdfc521c8f20f62b1ab48c45d14bb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6D 11104 bytes