Malicious PDF — malware analysis report

Static analysis result for SHA-256 d220524fe79e91f3…

MALICIOUS

PDF

46.4 KB Created: 2020-09-08 04:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccaf49284e107baa219f96faff5f466c SHA-1: 5971c1617d6dde5446168212b24b1b2e7b073b3d SHA-256: d220524fe79e91f39dc65aa2251db05f4d4d06fcc4a1cdec10f9979a7bbdc346
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, masquerading as a document related to 'Ardhanareeswara stotram lyrics in telugu pdf'. One of the primary links directs to a known malicious redirector at 'ttraff.club'. The presence of a link farm and a critical heuristic firing for malicious redirector links indicates a phishing or redirection attempt. The ML classifier also 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.club/wix?keyword=ardhanareeswara+stotram+lyrics+in+telugu+pdf
    • https://cdn.shopify.com/s/files/1/0430/6075/6641/files/bilal_saeed_all_songs_ringtone.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/264867496.pdf
    • https://cdn.shopify.com/s/files/1/0431/0541/9418/files/95228183089.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/red_orb_pixelmon.pdf
    • https://cdn.shopify.com/s/files/1/0428/8829/8662/files/meluvogivapalulam.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/marale.pdf
    • https://cdn.shopify.com/s/files/1/0438/5318/5174/files/concrete_and_abstract_nouns_worksheet_7th_grade.pdf
    • https://static.usrfiles.com/ugd/34ec99_d19c107369894681bd3f03fb92c121d6.pdf
    • https://static.usrfiles.com/ugd/3d0627_71aba1fe296245f397ef15be11cda5ee.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/totavari.pdf
    • https://cdn.shopify.com/s/files/1/0437/1084/1000/files/b._ed_form_2018_rajasthan_university.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0465/4733/7374/files/assistive_touch_mod_apk_2019.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054dc.bin
e956d139b7c9fb806602b5c055e9eda3c59e508917748e460f61314459713630
pdf-font-stream PDF embedded font (sfnt) at offset 0x54DC 5752 bytes
font_01_sfnt_off00006861.bin
5c17f4d6686a223bdb56bfdbaeca90266394274a846308aa274e0451dd5d9d05
pdf-font-stream PDF embedded font (sfnt) at offset 0x6861 8220 bytes
font_02_sfnt_off000081a1.bin
c3190fdf9404ab05a0b6fdec155b57b497f39027692effe8feac38aabace72ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x81A1 13240 bytes