Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68544f9603b946d…

MALICIOUS

PDF

39.8 KB Created: 2020-08-14 20:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef6e58934651288a8f5e22a940e09157 SHA-1: 3c53349df9f007b2d84290d3cf922f5146a03b8f SHA-256: f68544f9603b946dbc253a2d06b991447c41048c4b9bb1b7b206e5a4880ba191
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic identifying it as a redirector link to known malicious infrastructure. Additionally, it contains a link farm with numerous external PDF links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute content. The primary malicious URL identified is https://ttraff.com/pify?keyword=alesis+dm6+electronic+drum+set+manual, which is likely used for phishing or to serve further malicious content.

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=alesis+dm6+electronic+drum+set+manual
    • http://jalanef.adventure-emporium.net/uploads/1/3/2/6/132681670/7788f3ebc12e21.pdf
    • http://warez.trinityau.com/uploads/1/3/1/8/131857120/b55e178e992d45.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/boundedness_theorem.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/jefamimiso.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/base64_image_decoder_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/24047444056.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/english_language_techniques_and_definitions.pdf
    • https://cdn.shopify.com/s/files/1/0433/4321/6789/files/xomijaware.pdf
    • https://cdn.shopify.com/s/files/1/0438/3490/0637/files/fajixovu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5250/7036/files/28666183015.pdf
    • https://cdn.shopify.com/s/files/1/0434/4755/0119/files/stuart_fishing_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rajijabobuzev.pdf
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/embodiment_of_scarlet_devil_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3325/5323/files/73774567474.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nedodakamilutejevojive.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_off00005e39.bin
520675686770246196228ebda36a9ada26b122604eddc64c698c088f3e28bec1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E39 5228 bytes
font_01_sfnt_off00006fde.bin
eb6dfa8e0092b8e4a50662351304b608e2e2c258fd3a092a0782b4774dcebf7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDE 10080 bytes