Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e3d9b79f84d549…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 21:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 879adb320cd1589bd53c96a0608326ed SHA-1: 688bc51ea1592302db0f7638c1dadcede544c927 SHA-256: 04e3d9b79f84d549bc03071d2baaf6cf64f1a8a12083880ac514643434df4c23
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a download link for 'minecraft pe 2.0'. The document body also contains this URL and other benign-looking Shopify URLs, likely to obscure the malicious intent and appear legitimate. The ML classifier strongly indicates maliciousness, and the presence of a redirector link points to a phishing or malware distribution attempt.

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.ru/wix?keyword=minecraft+pe+2.0+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/nyc_rent_stabilized_lease_form.pdf
    • https://cdn.shopify.com/s/files/1/0435/9258/1288/files/morgan_and_mikhail_anesthesia.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/26160609228.pdf
    • https://cdn.shopify.com/s/files/1/0433/6641/6534/files/redenulepaxuwox.pdf
    • https://cdn.shopify.com/s/files/1/0435/5555/3443/files/46407160487.pdf
    • https://cdn.shopify.com/s/files/1/0434/7992/4902/files/roland_barthes_image_music_text.pdf
    • https://cdn.shopify.com/s/files/1/0428/6152/7206/files/epoxy_adhesives.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6974/files/fubatazilimosotekatu.pdf
    • https://static.usrfiles.com/ugd/b8c837_945b6f7220ff415db9fb288c663fedef.pdf
    • https://static.usrfiles.com/ugd/b8c837_f2569b161aa84c88860415f8f74c45e8.pdf
    • https://static.usrfiles.com/ugd/4b874d_3fe6be3bac104c138f1fd8bcd8bab504.pdf
    • https://cdn.shopify.com/s/files/1/0461/7584/6563/files/48803933306.pdf
    • https://cdn.shopify.com/s/files/1/0469/0775/2608/files/67600167711.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_off00006483.bin
010f15e175f7f37cc38aa155014082489987e89c8ddda33009ed1bbd808949f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6483 5372 bytes
font_01_sfnt_off000076ed.bin
58b1589b6f429f4f9534ccba69a315def133c4005297aa4fd4327f5e60f958f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x76ED 10364 bytes