Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f02271fb048449…

MALICIOUS

PDF

42.9 KB Created: 2020-08-23 12:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d01fb239b1726e77211cde3f813f5db SHA-1: e1725101c74a1d242fa90585a5d98f5fcb130e5e SHA-256: 50f02271fb048449023b493d219fae41fff81826729a15d51bc199307c6dfa9f
152 Risk Score

Malware Insights

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

This PDF document contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=acca+examiner+report+f7`. The document also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on `cdn.shopify.com`. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring the user to click the malicious link, likely leading to a further malicious download or phishing page.

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=acca+examiner+report+f7
    • http://files.beatricestravelingboutique.com/uploads/1/3/1/0/131070051/leputepog-tafexoxoze-wiravuzeri-lejewijulaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9728/2977/files/60284421567.pdf
    • https://cdn.shopify.com/s/files/1/0464/7301/9560/files/bjt_biasing.pdf
    • https://cdn.shopify.com/s/files/1/0428/6103/5686/files/gunediguwadurikadokejaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/4098/0647/files/frozen_cartoon_movie.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/character_development_curriculum_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0446/2444/5603/files/84671766419.pdf
    • https://cdn.shopify.com/s/files/1/0431/3487/7847/files/equivalent_exponential_functions_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/finonazi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9141/8518/files/berg_balance_scale_test.pdf
    • https://cdn.shopify.com/s/files/1/0438/0341/0589/files/2784981241.pdf
    • https://cdn.shopify.com/s/files/1/0435/9425/2456/files/7802117770.pdf
    • https://cdn.shopify.com/s/files/1/0466/4459/2805/files/xipepobilumuvatuxebonu.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_off00005df6.bin
4c9df6c11eed614d374802cf839362d346f6291cca4e281d8230a79a734c0c2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF6 4876 bytes
font_01_sfnt_off00006e6e.bin
4c3399f7c7b1de80b963afd9d600a4e0e8d1553e725b1e6d2530d6497605cd51
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E6E 10112 bytes
font_02_sfnt_off000090f6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x90F6 4324 bytes