Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56e7c86fca0e6f6…

MALICIOUS

PDF

48.0 KB Created: 2020-08-19 06:57:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8ee806d281eb2dc5c4d92d447dda9d1 SHA-1: b60545eb6cdb56404e4b09b932fd065d053738b5 SHA-256: e56e7c86fca0e6f6f0fdcb71ee73f93f213c4cb0466d82c370ba363c7bd550f5
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.com/pify?keyword=abbyy+finereader+sprint. Additionally, the PDF exhibits characteristics of a link farm, with numerous links pointing to external resources, some of which are hosted on potentially suspicious domains. The ML classifier strongly flagged this PDF as malicious.

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=abbyy+finereader+sprint
    • http://pigulufe.rsq-d.com/uploads/1/3/0/9/130968988/5600643.pdf
    • http://files.paulgoldberg.com/uploads/1/3/2/6/132695805/bokimepanebitudu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5661/8917/files/applied_functional_analysis_balakrishnan.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/99800743254.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76588695657.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4552/files/notebedatinekuvo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8173/5073/files/74593863698.pdf
    • https://cdn.shopify.com/s/files/1/0428/9619/5737/files/93979409204.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2768/files/munofowemiluxejopatox.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2063/files/tennessee_drivers_license_change_of_address.pdf
    • https://cdn.shopify.com/s/files/1/0449/9626/4094/files/57550856516.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8133/files/48269263431.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/nemojoxumarom.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_off00007d0b.bin
ad6de8a3b6c01f177c5b19634c6fd8ee05b0db4b22733a71656f0cd0ad49a4bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0B 5236 bytes
font_01_sfnt_off00008ee1.bin
bf27dc5415fc67b94ba6a1652ae77c73fedf598c0416f24f9da7edc9ca8649e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE1 10604 bytes