Malicious PDF — malware analysis report

Static analysis result for SHA-256 6630fe34939823b2…

MALICIOUS

PDF

42.2 KB Created: 2020-08-08 11:41:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6204260181b2c2b8a179531a0ca9e17 SHA-1: 05f17bb633063ad8ece894baade7417fee6046a5 SHA-256: 6630fe34939823b291a5210531a9523b61c7e3ce2362750ce55f7ffeeb536e03
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one to a known malicious redirector at `https://ttraff.com/pify?keyword=learn+excel+formulas+pdf`. The document body, though heavily obfuscated, appears to contain text related to Excel formulas and includes the malicious URL. This suggests the PDF is designed to trick users into visiting malicious infrastructure, likely for further exploitation or phishing.

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=learn+excel+formulas+pdf
    • http://files.campevergreendaycamp.com/uploads/1/3/1/4/131453214/2627312.pdf
    • http://files.toddchang.com/uploads/1/3/1/4/131407625/tewonitokuw.pdf
    • http://files.psychgroove.com/uploads/1/3/0/8/130814706/0762770030a5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1940/2397/files/famidijum.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/ruvabodojerareliwaxixig.pdf
    • https://cdn.shopify.com/s/files/1/0430/9817/7693/files/stardew_hidden_achievements.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/59182447081.pdf
    • https://cdn.shopify.com/s/files/1/0437/8850/1143/files/probability_exercises_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/abel_albonetti_workout.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2454/files/the_attractor_factor_joe_vitale.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/macmillan_check_your_aviation_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/jewukiwajajoxozosiresat.pdf
    • https://cdn.shopify.com/s/files/1/0437/4098/7544/files/zudinejovuwofelexuvuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/ropat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sogogetuxupoxex.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_off00006821.bin
45d2ee4085e138e5a84d7b16078a849b78cbe30a3be7eec096137a0099522ec6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6821 5312 bytes
font_01_sfnt_off00007a28.bin
e38244f9a9802461d74af6b618b2b2c5fd8d6a119ff49220ee25a2f880437ca6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A28 9940 bytes