Malicious PDF — malware analysis report

Static analysis result for SHA-256 1394e9985abdec4b…

MALICIOUS

PDF

34.6 KB Created: 2020-08-19 14:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f129c5615f3a2a6201febfc9361090c1 SHA-1: 3ae081e974c88889c682f4de828eef8660bc2ced SHA-256: 1394e9985abdec4bdde6b309d37343604c7af5b7786587ebca2533df1ed67779
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one critical heuristic identifying it as a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=greensand+plus+spec+sheet, is a known redirector. The document body, though heavily obfuscated, contains this URL, suggesting an attempt to disguise malicious activity as a technical document. The presence of multiple Shopify links, some benign and some potentially malicious, indicates a link farm strategy.

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=greensand+plus+spec+sheet
    • http://zitadukuj.mexiitems.com/uploads/1/3/0/8/130813330/9552732.pdf
    • http://dumij.acscmerch.com/uploads/1/3/1/8/131856476/fewibuxum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/after_effect_tutorial_beginner.pdf
    • https://cdn.shopify.com/s/files/1/0434/6164/0358/files/attribution_theory_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/java_string_to_byte_array.pdf
    • https://cdn.shopify.com/s/files/1/0434/7127/4146/files/subject_verb_agreement_worksheet_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/0823/7473/files/isometric_drawing_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0431/1344/7581/files/95021095588.pdf
    • https://cdn.shopify.com/s/files/1/0430/5790/5818/files/rolifojidemaxixedeko.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/13230546597.pdf
    • https://cdn.shopify.com/s/files/1/0436/1627/2547/files/25593184104.pdf
    • https://cdn.shopify.com/s/files/1/0440/6080/3237/files/44159936751.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/wegolaxutozig.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/european_guidelines_differentiated_thyroid_cancer.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_off0000487f.bin
584b577dc37e10c9fffeac52044ab852b19b9b1270377845dbea21cf59489c7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x487F 5192 bytes
font_01_sfnt_off00005a1c.bin
f5f59663db817c01018c61230a833b98b76ed849292080630dfcc9905640bd3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A1C 10512 bytes