Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e11976aa052ed0…

MALICIOUS

PDF

43.5 KB Created: 2020-08-29 21:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ef072cf4e0c352a307279788c7c4b7e SHA-1: 021a7fede8e246afaedd1799441621db17bcaba9 SHA-256: 03e11976aa052ed0fcb625c43e4ecefaffadf0a12d8da99596c8e0a883171af8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a direct link to a redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains a URL that promises free access to media content, a common lure for malicious documents. 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.cc/wix?keyword=american+horror+story+season+2+full+episodes+online+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/5669/2390/files/space_flight_simulator_mod_apk_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/nijepuwujasu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/mariage_d_amour_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/mac_app_store_not_ing_xcode.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8839/files/74831765243.pdf
    • https://cdn.shopify.com/s/files/1/0431/0849/9618/files/34476558920.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/beveiligde_bewerken_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/7932/7126/files/3712355403.pdf
    • https://cdn.shopify.com/s/files/1/0450/0144/1448/files/pijagega.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/22238325888.pdf
    • https://cdn.shopify.com/s/files/1/0434/1697/7559/files/76964955024.pdf
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/40897508235.pdf
    • https://static.usrfiles.com/ugd/b8c837_a79c79d740554823911661cf23d62af8.pdf
    • https://static.usrfiles.com/ugd/b8c837_b28e22df7d4c474ea6935c7c55708db0.pdf
    • https://static.usrfiles.com/ugd/0d002d_2e8b7964978d495dbf387ffbc4ccfa5e.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b74.bin
d4ceebb83f6b537f3b5cf5ad68faabb2613766f6002efaa1679c81e651aa133a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B74 5500 bytes
font_01_sfnt_off00006df2.bin
74ad7863c8112fe741dc65eb3255c31a0eb5bd18339a2eeb68375dad72764902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF2 10664 bytes
font_02_sfnt_off00009278.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9278 4324 bytes

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