Malicious PDF — malware analysis report

Static analysis result for SHA-256 2658e80e05b0e49c…

MALICIOUS

PDF

45.2 KB Created: 2020-07-31 05:34:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f212623f8c7d185bbb6c26bd7e22f3c5 SHA-1: 1f6614a1a245755ddd0d249036fd5f722ca9da99 SHA-256: 2658e80e05b0e49c88cba37c39c19937103798eb8a3143d5191837973d04718c
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains hosting other PDFs, and at least one link to a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body text and embedded URLs suggest a lure to a malicious site, likely for phishing or malware distribution.

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.cc/pify?keyword=borg+fatigue+scale+pdf
    • http://files.agbeautyservices.com/uploads/1/3/0/7/130776726/5541887.pdf
    • http://files.amazepropertiesofmi.com/uploads/1/3/1/4/131405977/bugifudetikob_mazodexu_befiboguxowavav_nuzemisavekeju.pdf
    • http://files.the2degrees.org/uploads/1/3/2/7/132712115/xurokixodijozo_nazoxutulurexu_nutezusev_vodod.pdf
    • http://files.fund-intent.com/uploads/1/3/1/4/131407138/lozitufumutawatulufi.pdf
    • http://files.fund-int
    • https://cdn.shopify.com/s/files/1/0433/6844/8165/files/dilujuzisepodimilig.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/pivasalot.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/fibawixemezaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1158/files/10297781714.pdf
    • https://cdn.shopify.com/s/files/1/0431/9733/3668/files/rusejevowokajumosu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5442/3445/files/tixamipulawuxagi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5792/9621/files/80917083121.pdf
    • https://cdn.shopify.com/s/files/1/0434/8408/6424/files/vakazor.pdf
    • https://cdn.shopify.com/s/files/1/0429/1241/5897/files/23393486346.pdf
    • https://cdn.shopify.com/s/files/1/0438/6127/8870/files/kokomevekukif.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/94142040416.pdf
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/54279271568.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_off000072e2.bin
c01cd2393a34bc5645d8cef63aa1dc921ef4aad92caf99b9eb467a8de41f0f46
pdf-font-stream PDF embedded font (sfnt) at offset 0x72E2 5148 bytes
font_01_sfnt_off0000847e.bin
c5b3c16e141b21d56d4a5aef9911d3bb0b645ea9deafc1bfcd6954e1e68a2c74
pdf-font-stream PDF embedded font (sfnt) at offset 0x847E 10312 bytes