Malicious PDF — malware analysis report

Static analysis result for SHA-256 9927388c736f04e1…

MALICIOUS

PDF

34.9 KB Created: 2020-08-20 22:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28cdcfd6fe6179c3408421fd3b905b1a SHA-1: 6378db2e826d0acada4584efaa39cd99da256f30 SHA-256: 9927388c736f04e14b3942cd56d5c364b6261d5fa62a458afc5261e367a7df62
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, forming a link farm. One of these URLs, https://ttraff.cc/pify?keyword=spacetoon+go+apkpure, is identified as a malicious redirector. The presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to malicious websites, likely for phishing or malware distribution. The ML classifier also flagged this PDF with high confidence.

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=spacetoon+go+apkpure
    • http://files.shopykapparel.com/uploads/1/3/2/6/132681343/nuxumiwexebena.pdf
    • http://fulenunaj.zarajones.com.au/uploads/1/3/2/8/132814969/1966206.pdf
    • http://files.gpsfirstaidtraining.com/uploads/1/3/1/4/131437862/ganasamuzitu.pdf
    • http://files.millennialcruisers.com/uploads/1/3/1/0/131070362/temotawan.pdf
    • https://cdn.shopify.com/s/files/1/0430/6590/1210/files/77490710204.pdf
    • https://cdn.shopify.com/s/files/1/0437/6055/0046/files/mutodovukik.pdf
    • https://cdn.shopify.com/s/files/1/0440/7135/4533/files/21292500674.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/32380490668.pdf
    • https://cdn.shopify.com/s/files/1/0435/3120/6808/files/scrap._tf_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/gubavokobewovizutuve.pdf
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/92353910274.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5879/files/arabic_to_urdu_translation_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/medial_epicondylitis_exercises_spanish.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/16914272514.pdf
    • https://cdn.shopify.com/s/files/1/0436/0326/3645/files/50165079107.pdf
    • https://cdn.shopify.com/s/files/1/0430/1943/6185/files/55077934305.pdf
    • https://cdn.shopify.com/s/files/1/0436/9534/1723/files/51920616841.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_off00004a8a.bin
9d4d0be9e1c2748ecf90387cf39812c806ade6fc6b07b3b5c461b37e70bb1c9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8A 5060 bytes
font_01_sfnt_off00005bcb.bin
d11f67f2668db6e1ad56ccd639c7f237f5ac408e5b900c4a30adee9fecebc683
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCB 10476 bytes